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December 06, 2020, 02:45:27 AM *
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1  Alternate cryptocurrencies / Tokens (Altcoins) / MOVED: Virusi, Malware, Keyloggeri se šire preko Telegrama on: December 05, 2020, 07:35:56 PM
This topic has been moved to Off-topic (Hrvatski).

https://bitcointalk.org/index.php?topic=5076175.0
2  Alternate cryptocurrencies / Tokens (Altcoins) / MOVED: Pola Phishing Stranica Sada Posjeduje Zeleni Znak sa Katancom, https on: December 05, 2020, 07:35:06 PM
This topic has been moved to Off-topic (Hrvatski).

https://bitcointalk.org/index.php?topic=5078796.0
3  Other / Beginners & Help / An Interview with Andreas M. Antonopoulos regarding 51% attacks on Bitcoin on: November 27, 2020, 11:09:41 AM
In one forum post the other day, I stumbled upon a YouTube link that a user posted in which Andreas M. Antonopoulos talks about 51% attacks on the Bitcoin network. It is a scenario that seems possible to many, but Andreas perfectly explained why such an event would be difficult to carry out.

When he visited Berlin for a crypto conference in 2019, he gave an interesting interview which you can watch here:
https://www.youtube.com/watch?v=7w-Q2GOZJSQ


Here are the most important parts that were mentioned in the interview:

Andreas was asked whether it would be possible for a nation state to acquire a sufficient amount of hardware to carry out a 51% attack on the Bitcoin network, and to completely take control of the whole network.
Andreas considers that an impossible task, and gives several reasons to why that is.

- The required amount of mining hardware needed for a 51% attack on Bitcoin is simply not publicly available for sale. Companies that manufacture and sell such mining devices, are already doing so at full capacity. Everything they manufacture, they sell very quickly. There are no hidden stocks that someone could buy up. He mentions an interesting fact that if someone wanted to carry out such an attack, he would have to constantly buy all the ASIC miners from all of the companies that exist on the market, for more than a year. With the sole aim of getting close to that 51% hashrate needed for an attack. So this is an impossible task.

- The second assumption is that someone could buy the required materials, needed to produce a sufficient amount of mining devices for a successful attack. Andreas says that the best miners are made of 16-12nm silicon chips. Only those made with the best quality materials would have to be used to reach that rate needed for a 51% attack. If chips with lower quality materials were to be used, many more mining devices would be needed. The companies that produce this type of silicon, produce it mostly for graphics cards and devices for artificial intelligence units. They already have plenty of work to do and don’t have the capacity to meet the demands of a new client who would like to buy all of that to attack the Bitcoin network.

- The third possibility that Andreas talks about is that someone builds their own factory where they would produce the required devices. The investment needed for such a venture would be tens of billions of US$. These devices would then consume a huge amount of electricity and create new expenses in the multi-million dollar regions.


Even if such an attack were to be successful, it must be sustained. And that requires additional huge investments. Now, here is the problem. Those who mine Bitcoin honestly, get rewarded for their work with mining fees and newly created bitcoin. They cover their expenses (for electricity) and make a decent profit. Those who attack the network don't receive any compensation from the network because they don't include transactions in their newly created blocks. They must cover their own costs and maintain the attack. Andreas estimates that these costs amount to 2000-3000 BTC per day!

Bitcoin created in this way would ultimately become worthless. Exchanges could blacklist it and it would never be sold. The attack could be resolved with a fork of the network, where the miners who respect the rules just continue with their work, while the other side that does not respect the rules and creates empty blocks would simply be excluded and blacklisted.


The end result of all this is tens of billions of US$ spent on the purchase and manufacturing of mining devices, and millions of US$ of electricity costs for an attack that could be quickly discovered and resolved with a fork. The miners who attack the network can only prevent the confirmation of certain transactions, or carry out double-spend attacks. In both scenarios, those coins could be blacklisted and would have no value. The Bitcoin network would not be interrupted. It would become even stronger over time because it overcame and survived a 51% attack.


In the second part of the video, Andreas talks about the differences between miners and full nodes.


Have a look:
https://www.youtube.com/watch?v=7w-Q2GOZJSQ
4  Local / Hrvatski (Croatian) / Intervju sa Andreas M. Antonopoulos u vezi 51% napada na Bitcoin mrežu on: November 26, 2020, 03:27:47 PM
U jednom od postova sam sasvim slučajno naletio na link u kojem Andreas M. Antonopoulos govori o 51% napadima na Bitcoin mrežu. Jedna opasnost koja se mnogima čini realna ali Andreas je odlično objasnio zašto je jedan takav scernarij teško izvodljiv.

Dok je bio u Berlinu na jednoj kripto konferenciji 2019, dao je zanimljiv intervju kojeg možete pogledati ovdje:
https://www.youtube.com/watch?v=7w-Q2GOZJSQ


Evo najvažnijih dijelova tog intervjua:

Pitanje koje je Andreasu postavljeno je da li bi bilo moguće da neko pribavi dovoljnu količinu hardvera, da izvrši 51% napad na Bitcoin mrežu, i u potpunosti preuzme kontrolu nad mrežom.
Andreas smatra to nemogućim i iznosi nekoliko razloga zbog čega je to tako.

- Potrebna količina mining hardvera za 51% napad na Bitcoin jednostavno nije dostupna u prodaji. Kompanije koje proizvode i prodaju mining uređaje već imaju pune ruke posla. Sve što proizvedu, vrlo brzo i prodaju. Dakle, ne postoje zalihe koje bi neko mogao kupiti. On iznosi zanimljiv podatak da ukoliko bi neko želio da izvrši jedan takav napad, morao bi da tokom više od godine dana pokupuje sve ASIC minere od svih kompanija koje postoje na tržištu i prodaju te uređaje. Samo s ciljem da bi se približio toj cifri od 51% hashrate-a potrebnog za napad. Ovo je dakle nemoguća misija.

- Druga pretpostavka je da li bi neko mogao da kupi materijale potrebne za proizvodnju dovoljne količine uređaja za uspješan napad. Andreas napominje da se najbolji mineri prave od silicijskih čipova sa 16 - 12nm. Samo oni napravljeni od najboljeg materijala bi se morali koristiti kako bi se dosegao taj broj potreban za napad od 51%. Ukoliko bi se koristili slabiji materijali, bilo bi potrebno mnogo više uređaja. Kompanije koje proizvode tu vrstu silicija, to proizvode najviše za grafičke karte i uređaje za umjetnu inteligenciju. Dakle već imaju i previše posla i ne maju kapaciteta da zadovolje potrebe novog kupca koji bi to želio da kupi kako bi napao Bitcoin mrežu.  

- Treća varijanta o kojoj Andreas govori je o mogućnosti da neko napravi svoje postrojenje gdje bi proizveo potrebne uređaje. Investicija za jedan takav poduhvat bi bila nekoliko desetina miljardi US$. Ti uređaji bi zatim trošili ogromnu količinu električne energije i pravili nove multi milionske troškove.


Čak i da je jedan takav napad uspješan, on se mora održavati. A to zahtjeva dodatne velike količine investicija. Tu onda dolazimo do sljedećeg problema. Oni koji rudare Bitcoin poštujući pravila, za svoj posao budu nagrađeni rudarskim naknadama i novo-kreiranim bitcoinom. Pokrivaju svoje troškove (za električnu energiju) i ostvaruju određenu zaradu. Oni koji napadaju mrežu, od te iste mreže ne dobivaju naknadu jer u novo-nastale blokove ne uključuju transakcije. Sami moraju da snose troškove napada i održavanje istog. Andreas smatra da su ti troškovi između 2000-3000 BTC dnevno!

Bitcoin kreiran na takav način bi postao bezvrijedan. Mjenačnice bi ga mogle staviti na crnu listu i nikada ne bi bio prodan. Napad bi se mogao rješiti forkom, gdje strana koja poštuje pravila samo nastavi sa svojim radom, dok druga strana koja ne poštuje pravila i kreira prazne blokove bi jednostavno bila isključena.  


Krajni ishod svega ovoga su desetine milijardi US$ za kupovinu i proizvodnju uređaja, milioni US$ na troškove struje za napad koji bi brzo bio otkriven i rješen forkom. Mineri koji napadaju mrežu mogu samo spriječiti potvrđivanje određenih tranksakcija ili izvršiti double-spend napad. U oba slučaja, ti coni mogu otići na crnu listu i ne bi imali nikakvu vrijednost. Bitcoin mreža ne bi stala sa radom. Postala bi vremenom i još jača jer je savladala 51% napad.


U drugom dijelu videa, Andreas priča o razlikama između minera i full node-a.
Odličan izvor informacija.

Pogledajte
https://www.youtube.com/watch?v=7w-Q2GOZJSQ
5  Other / Beginners & Help / Unpopular Opinions About Bitcoin on: November 21, 2020, 10:28:58 AM
The Australian comedian Jim Jefferies had a piece called unpopular opinions. In his shows, he discussed things like shaming fat people, or not washing his hands after peeing.

So today I am presenting Unpopular Opinions About Bitcoin.

Every now and then I will start a new unpopular opinion based on something that is said or thought about Bitcoin. We will then discuss the unpopular opinion and try to oppose it with facts.


First topic on the agenda for this thread:
Derek Sorensen claims that bitcoin will never become the world's #1 currency!?
6  Other / Beginners & Help / I can finally call myself a Self-made Legendary member on: November 20, 2020, 10:20:47 AM
Since it has become a customary practice to write a few lines after an on-forum achievement, I will join the fun.

Since yesterday night, I now belong to the club of those members who have received 1000 merits on the forum (not counting the airdropped merits). After a quick count, based on the data that tranthidung has compiled here, the list consists of 103 different users.

I was a Hero member when the merit system was introduced, and following my 1500 merit last night, I am now at 1000 awarded merits. The system works if you play along and show some effort in your posting habits. I am not the most knowledgeable member but I still made it into a prestigious group.

Be helpful, be positive, and contribute in any way you can. Be ready to praise and accept criticism - it's all part of the process. Admit your mistakes, correct them, and accept the other side of the story, if it is the correct one. Try to help and correct those who want to be part of the forum and are just starting out. Everyone is a noob at one point in his life and that is nothing to be ashamed off. There are still so many things that I don't know or have never tried, but one day, e?

All hail bitcoin!     
7  Bitcoin / Bitcoin Discussion / Do you know the difference between Bitcoin and bitcoin? on: November 11, 2020, 01:53:34 PM
As I was completing a survey about an hour ago, there was some mention about the distinction between Bitcoin spelt with capital B, and bitcoin with a lowercase b. Although I have heard about this before, and I usually pay a lot of attention to spelling and punctuation, I have to admit that I have totally forgotten about this.

When we talk about Bitcoin as a blockchain, payment method, or a service, we are supposed to spell the word with an uppercase B.

Here is an example:
My best friend doesn't see the advantages of Bitcoin.

When we talk about the currency or mention numbers and quantitates of the asset, the word should be spelt with a lowercase b.

Here is an example:
I sent my best friend 1 bitcoin as a birthday gift. 


Do you pay attention to this while you are posting on the forum?
8  Local / Hrvatski (Croatian) / Američka vlada zapljenila preko 1 Milijarde US$ u Bitcoinima on: November 07, 2020, 11:07:13 PM
Koliko vidim niko nije o ovome pisao kod u našem lokalu. Pa evo jedna vijest koja će za godinu ili dvije uzrokvati veliki dump.

3. Novembra je vlasnik četvrtog po veličini Bitcoin novčanika poslao blizu 70.000 BTC sa adrese 1HQ3Go3ggs8pFnXuHVHRytPCq5fGG8Hbhx na bc1qa5wkgaew2dkv56kfvj49j0av5nml45x9ek9hz6. Ovaj novčanik je često bio povezivan sa stranicom Silk Road ali zapravo niko nije znao na koji način i ko je njegov vlasnik. Odmah su krenule spekulacije. Smatralo je se da je novčanik hakovan, jer je bio prodavan na raznim undergorund forumima. Drugi su vjerovali da su američke sigurnosne službe uspjele da zapljene sredstva. Treća varijanta je bila da je novac premjestio sam vlasnik novčanika sa legacy na native segwit adresu.

Prije par dana stigla je potvrda šta je se zapravo desilo. Američka vlada je potvrdila da je ona ta koja je izvršila zapljenu sredstava i prebacila iste na svoje adrese.

https://www.justice.gov/usao-ndca/pr/united-states-files-civil-action-forfeit-cryptocurrency-valued-over-one-billion-us
https://blog.chainalysis.com/reports/silk-road-doj-seizure-november-2020
https://www.justice.gov/usao-ndca/press-release/file/1334771/download


Kada su u pitanju količine koje su u pitanju, evo šta je zapljenjeno:

- 69,370 Bitcoin (BTC)
- 69,370 Bitcoin Cash (BCH)
- 69,370 Bitcoin SV (BSV)
- 69,370 Bitcoin Gold (BTG)

Korišteni su Chainalysis alati kako bi se ušlo u trag digitalnim sredstvima. Zanimljivo je šta su pronašli. Tokom istrage pronašli su dosad nepoznate 54 transakcije. Analizama su utvrdili da tim novcem raspolaže poznati haker Individual X. On je taj Bitcoin ukrao od Silk Road-a. 

Dio novca (101 BTC) kojeg je Individual X hakovao, prodan je preko mjenačnice BTC-e 2015. Ostatak od 69.370 BTC on je prebacio na adresu 1HQ3Go3ggs8pFnXuHVHRytPCq5fGG8Hbhx, gdje su stajali sve do prije par dana. 

Dolazimo do 3. Novembra 2020. Nakon što amerikanci saznaju ko je vlasnik Bitcoina, Individual X potpisuje sporazum sa Američkim Odvjetništvom i pristaje da im preda cjelokupni iznos. Sredstva su prebačena u posebni fond - TFF. Tim fondom se finansira rad državnih službenih agencija a novac od prodaje Bitcoina i ostalih sredstava će se koristiti za obuku, trening i modernizaciju službe.

Sve informacije o ovoj zapljeni možete pročitati ovdje:
https://www.justice.gov/usao-ndca/pr/united-states-files-civil-action-forfeit-cryptocurrency-valued-over-one-billion-us
https://blog.chainalysis.com/reports/silk-road-doj-seizure-november-2020
https://www.justice.gov/usao-ndca/press-release/file/1334771/download   
9  Economy / Gambling discussion / Sportsbooks often offer different odds for the same type of bet on: November 01, 2020, 07:31:01 PM
Here is a piece of information that many of you have probably noticed. But if you aren't that much into betting on sports, you might not know about it.
If you bet on football/soccer, you know that there is a type of bet called Double Chance. In such a selection two outcomes of the match result in a win of your bet.

Take a look at the picture below.



A Double Chance on Benevento win/draw pays 1.69. Just above that selection, you can place an Asian Handicap bet +0.5 on Benevento. That is the exact same bet, the bookies just call it differently. The AH +0.50 bet is valued at 1.76 compared to 1.69 for the exact same bet. If you place an AH +0.50 bet on Benevento and the match ends in a draw - you win. If Benevento wins - you win. If Benevento losses - you loss, same as with the Double Chance bet.

The bookies often use these kind of tricks. Here is another one for different bets.



A Draw No Bet means that if the team you bet on draws the match, your bet wont be lost. It will be voided, and you will get your stake money back. If the team you bet on wins, you also win your bet. In the screenshot you can see that a Genoa Draw No Bet has an odd of 1.88. A few lines above, you can play an 0 Asian handicap on Genoa, which is the same type of bet, but the odds are slightly higher. 1.93 compared to 1.88. If the AH 0 match ends in a draw - you bet is voided. If your team wins - you win, and you lose your money of course if the opposition wins.


I have seen other types betting options that bookies use where you can bet on the same outcome, they just call it differently and offer higher-lower odds. Share your own examples of what you have discovered on different platforms while gambling on sports. 
10  Economy / Gambling discussion / Looking: Sources that show information about suspended/injured missing players on: October 31, 2020, 09:19:06 AM
Like the title says. It is for scientific and research purposes. Cool
I am looking for websites or sources, who at one place gather information about missing, injured or otherwise unavailable players for teams. Football, Basketball, Volleyball, Ice Hockey, any major team sports.

Is there anything like that available? You can post what you use here or PM me if you prefer.

Thanks!   
11  Local / Off-topic (Hrvatski) / Ledger Donjon Capture the Flag Igrica on: October 31, 2020, 08:30:39 AM
O ovome sam prije par dana pisao u engleskom dijelu foruma pa evo ukratko da i ovdje spomenem u čemu je riječ.


28. Oktobra je Ledger Donjon (sigurnosni odjel od Ledger-a) započeo Capture The Flag izazov i nagradnu igru za korisnike kriptovaluta. Ovaj događaj će trajati 3 tjedna, sve do 18. Novembra.

Korisnici će imati različite zadatke i izazove koje moraju rješiti. Postoje 3 vrste izazova:

- Opasnosti i rizici
- Napad-odbrana
- Mješovita nadmetanja


Možete očekivati razne zadatke koji se odnose na mrežnu sigurnost, forenziku, znanje o kriptu, web sigurnost, ratne igrice, itd.
Više informacija o zadacima možete pronaći ovdje.

Učešče je potpuno besplatno i dostupno je svima. Da biste sudjelovali, morate se prijaviti na https://donjon-ctf.io.
Za svaki izazov kojeg uspješno obavite, dobijat ćete bodove. Najbolje rangirani igrači dobit će neke od sljedečih nagrada.


Quote
1. Nagrada
400$ u Bitcoinu + 1 ograničeno izdanje Ledger Backup Pack

2. Nagrada
100$ u Bitcoinu + 1 ograničeno izdanje Ledger Backup Pack

3. Nagrada
1 ograničeno izdanje Ledger Backup Pack

Nagrade za 4. do 10. mjesta
1 ograničeno izdanje Ledger Nano X

Zvanični link za Ledger Donjon natjecanje: https://donjon-ctf.io/?fbclid=IwAR1nY2BqV3YjMl4C54n-7YfcX-H36UkaarIiEOlAPVVzu00LcqeJrGMoXog
Pravila igre: https://donjon-ctf.io/rules

*PS: Siguran sam da će dkbit98 biti oduševljen novostima od Ledgera i jedva čeka da učestvuje Grin
12  Other / Beginners & Help / A look at PayPal’s TOS and What it Means for Users on: October 31, 2020, 07:43:28 AM
As many people have already heard, on 21 October, PayPal introduced an option for its users to buy, hodl, and sell (exchange back to fiat) cryptocurrencies. At the moment, it is not possible to use your coins to shop and purchase goods and services at PayPal.

This is confirmed in their TOS that state:

Quote
As described in more detail below, here are some things you can do with the Cryptocurrencies Hub:

Buy Crypto Assets;
Hold Crypto Assets;
Sell Crypto Assets; and
View market information and educational content.

The following 4 assets can be purchased with the new service:
Bitcoin, Ethereum, Bitcoin Cash, and Litecoin.

I took a look at their new TOS for cryptocurrencies to understand precisely what rights and benefits crypto holders have. What follows are the most important parts.

Who is this service for?

- Only citizens of the United States and its territories can access the new service that Paypal calls Cryptocurrencies Hub.
- The service can’t be used by residents of Hawaii.


US customers may have to pay taxes on the profits they make after they sell/convert their crypto back to fiat.

PayPal users are not the owners of the coins! PayPal and their service provider Paxos always remains in the custody of your crypto. That means that users have no private keys or seeds. It’s a custodial service, similar to centralized crypto exchanges.

Quote
We keep a record of your interest in that omnibus account based on the amount of each type of Crypto Asset that is reflected in your balance. You do not own any specific, identifiable, Crypto Asset.

The purchased crypto can’t be withdrawn or sent to other wallets or users of PayPal. If you want to close your crypto hub, all purchased cryptocurrencies have to be sold before.

This is the part of their TOS that explain this:

Quote
You currently are NOT able to send Crypto Assets to family or friends, use Crypto Assets to pay for goods or services, or withdraw Crypto Assets from your Cryptocurrencies Hub to an external cryptocurrency wallet. If you want to withdraw the value from your Cryptocurrencies Hub you will need to sell your Crypto Assets and withdraw the cash proceeds from their sale.

What payment methods can be used to buy cryptocurrencies with?
- You can use everything except credit cards. You can use your PayPal balance, bank accounts, or debit cards.


There are some interesting points to note concerning the buying and selling of crypto. Since the price of coins fluctuates, users have a limited timeframe to buy/sell. This is pretty standard, nothing unusual here. If the transaction is not completed in time, PayPal will offer an updated price.

This is where it gets a bit interesting. When you want to buy crypto, this is what Paypal says in their TOS:

Quote
The updated price you see may be much higher than a price that just expired.
Apparently, the price can get higher, but can it also go lower? 😊

When it is time to sell your coins, here is the part of the TOS that mentions the price:

Quote
The updated price you see may be much lower than a price that just expired.
Is there any chance of the price to be higher? 😉


PayPal Fees

Quote
The amount that PayPal makes and the exchange rate provided may be different than what you would pay on other cryptocurrency platforms.
In other words, you will pay more than what you would spend on cryptocurrency exchanges. PayPal will charge you a margin fee + additional fees when you buy or sell your coins. The fees depend on the amount you are buying or selling. They are between 1.50% – 2.30%.   

The rates are available below. I also took a screenshot of the page for a better overview.
https://www.paypal.com/us/webapps/mpp/paypal-fees#Cryptocurrencies

PayPal will make money every time you buy or sell your crypto, but the amounts remain a secret.

Quote
We will not separately calculate or disclose the spread we earn on each transaction.

- If a cryptocurrency undergoes a fork, PayPal may or may not support the forked coins. If such an event happens, the TOS state that they can suspend all trading activities around that coin. You won’t be able to hold PayPal accountable for any losses you make concerning the forked coins.

- PayPal has the right to limit how much you can buy or sell. The standard weekly limit is $10.000, and the yearly is $50.000. PayPal can change these limits for your account.

- In case PayPal has reasons to believe that you have done something illegal, you should know that you are agreeing to the following terms:

Quote
You authorize PayPal to seize your Crypto Assets if we believe a transaction relating to those Crypto Assets involves money laundering, terrorist financing, fraud or any other type of crime.

- PayPal can choose to sell a user’s cryptocurrencies if that user has a negative balance in his PayPal account. (I am not sure how you can have a negative PayPal balance, but OK). In such a situation, PayPal can sell an amount of your crypto that is equivalent to what you owe PayPal.

Quote
If the balance in your Cash Account (including your Cryptocurrencies Hub) becomes negative for any reason, that negative balance represents an amount that you owe to PayPal. In addition to any rights we have under the PayPal Cash and PayPal Cash Plus Terms and Conditions, you authorize PayPal to sell your Crypto Assets and use the proceeds to pay a negative balance you owe to us in any PayPal account you own.[/b]


The source of information and quotations were taken from PayPal’s Cryptocurrency TOS:
https://www.paypal.com/us/webapps/mpp/ua/cryptocurrencies-tnc

dkbit98, a user from my local Croatian sub-board, wrote a very similar thread to this one in Croatian. Although I did not use that thread as a source, or inspiration for this one, I did notice it while browsing and posting in the Croatian section. I feel it is necessary to mention it here.

13  Bitcoin / Hardware wallets / Ledger Donjon Capture the Flag Challenge on: October 29, 2020, 12:37:49 PM

On 28. October, Ledger Donjon, the security department of Ledger started a Capture The Flag challenge for cryptocurrency users. This event will last for 3 weeks, until 18. November.

Users will be given different tasks and challenges to solve. There are 3 kinds of challenges:

- Jeopardy-style
- Attack-defence
- Mixed competitions


You can expect tasks related to network security, forensics, crypto, web security, wargames, etc.
Read more about the tasks here.

This is a free event, available to everyone. To participate, you need to sign up on https://donjon-ctf.io.
For every challenge you complete you will be awarded points. The best performers will receive a set of prizes.


Quote
1st Prize
400$ in Bitcoin + 1 limited edition Ledger Backup Pack

2nd prize
100$ in Bitcoin + 1 limited edition Ledger Backup Pack

3rd prize
1 limited edition Ledger Backup Pack

4th - 10th prizes
1 limited edition Ledger Nano X

Official link to the challenge: https://donjon-ctf.io/?fbclid=IwAR1nY2BqV3YjMl4C54n-7YfcX-H36UkaarIiEOlAPVVzu00LcqeJrGMoXog
Rules: https://donjon-ctf.io/rules

14  Local / Hrvatski (Croatian) / Da li znate kako je Bitcoin dobio svoj prepoznatljivi narandžasti logo? on: October 26, 2020, 09:28:27 PM
Jedna zanimljiva priča koju sam davno pročitao i evo napokon našao vremena da napišem nešto o tome. Riječ je o povijesti Bitcoin simbola i o tome tko i kako je napravio ovaj prepoznatljivi narandžasti logo kojeg svi toliko volimo vidjeti.

Sve ovo možete pročitati u članku na coindesk kojeg sam koristio kao izvor.
https://www.coindesk.com/about-that-orange-b-the-history-of-bitcoins-logos?fbclid=IwAR3us6wNxutwLrubE1Ht9dMmPRW8ls6ZxpW1x1dfIuJNCC1TAHC5Lh2AZ80

 

Priča počinje već sad davne 2009. Ko drugi nego Satoshi je dizajirao prvi logo u sklopu svog Bitcoin novčanika. Tada je to izgledalo ovako kao na slici ispod. Zlatni novčić na kojem je bilo ispisano BC.
*Link za sliku u orginalnoj rezoluciji


Nedugo zatim, na Bitcointalk-u počinje rasprava da bi simbol trebao da bude promjenjen. Nekima se nije sviđala skračenica BC, drugi su predlagali da se doda T pa da bude BTC.  
Tu temu iz 2010 možete da pogledate ovdje: https://bitcointalk.org/index.php?topic=41.0;all
S obzirom da fali dosta slika, pronašao sam arhiviranu verziju tadašnje teme. Evo je ovdje: http://web.archive.org/web/20140518050705/https://bitcointalk.org/index.php?topic=41.0;all


Početkom 2010, Satoshi predlaže novi dizajn. I dalje je u pitanju zlatni novčić nešto modernijeg izgleda ali je izbačena skračenica BC. Logo tada dobija znak BTC kojeg vidimo i danas. Ovaj je logo bolje prihvaćen od prethodnog, ali i dalje nisu svi bili zadovoljni.  


Orginalna tema od Satoshija: https://bitcointalk.org/index.php?topic=64.0
Njena arhivirana verzija: http://web.archive.org/web/20130525075737/https://bitcointalk.org/index.php?topic=64.0;all


1. Novembra 2010, iz vedra neba se pojavljuje korisnik pod imenom bitboy. U svom prvom postu na Bitcointalk forumu on predstavlja svoje radove i pita zajednicu za mišljenje. bitboy je taj koji je dizajnirao većinu logotipa koje viđamo i dan danas vezanih uz Bitcoin. Zanimljiva je činjenica da je inspiraciju kod kreiranja svojih logotipa našao u brendovima kao što su VISA i MasterCard.  

Slijedi jedan dio njegovih prijedloga.
Orginalna tema je ovdje: https://bitcointalk.org/index.php?topic=1631.0;all
A ovo je arhivirana verzija: http://web.archive.org/web/20130525203057/https://bitcointalk.org/index.php?topic=1631.0;all



Određene grupacije su se usprotivile novom logotipu, smatrajući da Bitcoin kao valuta ne bi trebala da ima nešto što asocira na logotip. Smatrali su da valute trebaju da budu predstavljene simbolima. To je bio slučaj sa € ili $. Bitcoin je po njihovom mišljenju trebao da ima znak Ƀ. To se na njihovu žalost nije desilo.

 


Sve ovo možete pročitati u članku na coindesk kojeg sam koristio kao izvor.
https://www.coindesk.com/about-that-orange-b-the-history-of-bitcoins-logos?fbclid=IwAR3us6wNxutwLrubE1Ht9dMmPRW8ls6ZxpW1x1dfIuJNCC1TAHC5Lh2AZ80
15  Bitcoin / Hardware wallets / New Ledger phishing mail targets individual users on: October 25, 2020, 09:04:11 PM
A new and well-written Ledger phishing mail is circulating. What is special about this one is that it is not only well written but it also addresses you with your first name. It is not a mass mail delivered to thousands of email addresses, it has only one receiver and targets one particular recipient. That means that someone who has access to the leaked database of Ledger users is probably sending those mails. 

The scammer claims that malware was detected on Ledger servers and that your crypto assets could be stolen. Anyone who received the mail is affected according to the sender. The mail suggests to download the latest version of Ledger Live. There is a link to it in the email. Users are also told to set up a new pin.

Users of this forum are already experienced enough to recognize this type of scam, but it never hurts to keep an eye out.
The sender of the e-mail is: info@ledgersupport.io

My friend abroad who got my Ledger device delivered to his house sent me this screenshot.






 
16  Economy / Scam Accusations / Fake Blockchain.com WBTC airdrop is being spammed on: October 16, 2020, 12:24:35 PM
This morning I received a spam email of a fake Wrapped Bitcoin airdrop. What is interesting is that it arrived to an email address of mine not associated with crypto, airdrops, giveaways of any kind, or this forum. As you can see from the screenshot below, the email is properly written with no obvious grammatical mistakes. It is not the usual "grammar-friendly" attempt.

Pay attention to the email address it came from, and the amounts the scammers are advertising. 0.05 WBTC is almost $570. Total value: $50 Million!
I haven't clicked on the link so I don't know if it leads to a phishing site or downloads malware.

The lesson is always the same. Don't click on unknown links and don't believe in free money!

17  Local / Hrvatski (Croatian) / Kako uraditi Double-spend sa Electrum novčanikom on: October 06, 2020, 02:08:56 PM
Pročitajte priču o jednom slučaju koji se desio jednom od korisnika ovdje: https://bitcointalk.org/index.php?topic=5279758.0

Ovo je prijevod posta kojeg je nc50lc napisao. Link tog posta je ovaj: https://bitcointalk.org/index.php?topic=5279758.msg55312842#msg55312842

Post govori o tome kako uspješno uraditi double-spend sa Electrum novčanikom. Ovo se može koristiti i u dobre i u zle namjere. O zlim neću pričati. Dobra stvar je da na ovaj način možda možete spasiti Bitcoin kojeg ste grešnom poslali na pogrešnu adresu.


Ovo se može uraditi sa novčanicima koji mogu da kreiraju potpisanu raw transakciju, gdje se može preskočiti proces emitiranja i slanja iste, a također postoje opcije za coin-control.
Electrum ispunjava ove uslove.

Najlakši način je kreirati potpisanu raw transakciju "koju ćete poslati samom sebi," prije slanja transakcije "na drugu adresu".
Na taj način vam neće biti potreban dodatni trud u vezi uklanjanja već poslate transakcije iz historijate vašeg novčanika.

A. Kreiranje potpisane raw transakcije koja će biti poslana u vaš novčanik.

1. Pokrenite Electrum i otiđite na "coins" tab (View->Show coins). Desnom tipkom miša kliknite i izaberite jedan ili više UTXO-a a zatim kliknite na "spend" da biste izvršili uplatu.



Vaš će izbor bit označen zelenom bojom.

2. Uzmite adresu iz vlastitog novčanika i kliknite na "send" tab. Ubacite svoju adresu u polje "pay to" i unesite iznos kojeg želite poslati ili kliknite na max.
Kliknite "send" ali u sljedećem izborniku koji će vam se otvoriti nemojte ponovo klikati na "send." Umjesto toga izaberite "Advance".
Kada vam se otvori prozorčić sa dodatnim opcijama, povećajte transakcijsku naknadu na jedan veliki iznos i izaberite opciju "replace-by-fee." Kliknite na "finalize".



Otvorit će se novi izbornik. Ovdje trebate kliknuti na "sign" (ovo je obavezno!):



3. Na istom izborniku, kliknite na "Export->Copy to clipboard":



4.Spremite tekst u novu datoteku:



5. Zatvorite izbornik i ne obračajte pažnju na upozorenje da se transackija neće spremiti klikom na "yes":



B. Pošaljite Bitcoin svojoj "meti"

1. Ako ste zatvorili Electrum ili je izbor UTXO-a resetovan, ponovite korak broj 1 i odaberite (UTXO) kojeg ste koristili prethodno.
2. Pošaljite tu transakciju kao što radite i sa normalnim transakcijama ali koristite naknadu od 1 sat/vByte. Nakon slanja, dobit ćete ID transakcije i ona će postati javno vidljiva na block explorerima.



Transakcija: 642bf8e3d46591485c5b0d9aef2349123a21378e784c3fac1014e907ac11bb36 (sada označena kao nevažeća).

C. Učinite transakciju nevažećom emitiranjem zamjenske transakcije

1. Nakon što odlučite da zamijenite transakciju, sve što morate učiniti je da pošaljete prethodno kreiranu "potpisanu raw transakciju" korištenjem "console" taba (View->Show console) ili uz pomoć neke od online usluga za emitiranje transakcija.

U Electrum console tab unesite:
Code:
broadcast("02000000000101c47926bed38d8c77ea6990aca56fab............................")
Transakcija se šalje sa navodnicima. 020000... je raw transakcija koju ste prethodno spremili u novoj datoteci.

Nakon toga, ova nova transakcija će zamijeniti onu prethodno poslanu transakciju, pod pretpostavkom da prvobitna transakcija još uvijek nije potvrđena na blockchainu. Nova transakcija mora imati veću naknadu od 1 sat/vByte i mora biti uključena opcija replace-by-fee:



Važeća transakcija: d5d5300996c661de9ffb4588ae0ac6a0be3ffdccc63d92e37c159f77ec97cbf0
 
18  Other / Meta / Is this giveaway allowed? on: October 05, 2020, 09:42:31 PM
I just came across this giveaway for a new casino and was considering applying on the thread to get some Free Spins. But then it got my thinking. Is it allowed to host and participate in on-forum giveaways that reward users with things such as Free Spins for slots.

- It is not an altcoin giveaway.
- it is also not a Bitcoin giveaway.
- It is an on-forum giveaway that requires incentivized posting of usernames (might be considered spam, low quality post, etc).

Can users participate in these activities without fear of being banned. I am asking for a friend. Grin
19  Other / Meta / Question to admins: How to I do this right? on: September 27, 2020, 07:19:43 AM
I opened a thread in the Gambling Discussion board yesterday. I am going to quote the entire OP so you can better understand what it is about first.

Background information

What is this all about? I have read many customer reviews where members of Bitcointalk are claiming that various casinos are refusing to let them withdraw their funds on the grounds that they have gambled and accessed the site from a restricted country/jurisdiction.

The only problem is that some casinos allow users from restricted countries to register and gamble, but when they want to withdraw their winnings, they are told they broke the TOS.

I have decided to test 10 random casinos from the gambling section to see whether or not I could enter their site from a restricted location or if there would be an IP ban or other notification telling me that I can't access their site.

How did I perform this test?

1. I opened the ANN threads of 10 casinos that were on the top of the list in the Gambling board.
2. I read the casino's TOS to find information about which countries are restricted.
3. I used a VPN to access the casino to test whether or not there was an active IP block from restricted countries.
4. I did not register a new account, but I clicked on the register buttons to see if it worked.

What now?

If someone's country is restricted from playing at a certain casino, citizens of that country shouldn't be able to register and deposit money to it. There should be an IP ban as soon as you load the site in your browser.
I am planning to notify the casinos who failed the tests.
I will do more tests in the next days and when I have more time and post the results.


Local Rules 

1. This is not a topic to discuss your favorite casinos, games, promotions, sports, etc. I will self-moderate the thread and delete any posts that promote/attack certain platforms.
2. You are free to do your own tests and post some results, as long as you were successful in accessing a site from a restricted location.
3. Keep the discussion nice and clean. 


If you have any suggestions, don't hesitate to let me know.

Notice the bolded and italicized sentence that says I am planning to notify the casinos who failed the tests.
My question is how do I do this properly without being reported/accused of spamming/advertising/PM harassment? 

My initial thoughts were to send the casinos a PM telling them about my tests, sharing a link to my thread, and advising them that it is possible to enter their platform from a restricted location. In my opinion, that shouldn't be possible and casinos should change their approach and prevent these kind of players from accessing their sites at all, and not when they are attempting to withdraw their winnings. 

I doubt this will be a big success, but I feel like I should try. What are your thoughts?
20  Economy / Gambling discussion / Which casinos have IP blocks in place for restricted countries? on: September 26, 2020, 07:21:08 PM
Background information

What is this all about? I have read many customer reviews where members of Bitcointalk are claiming that various casinos are refusing to let them withdraw their funds on the grounds that they have gambled and accessed the site from a restricted country/jurisdiction.

The only problem is that some casinos allow users from restricted countries to register and gamble, but when they want to withdraw their winnings, they are told they broke the TOS.

I have decided to test 10 random casinos from the gambling section to see whether or not I could enter their site from a restricted location or if there would be an IP ban or other notification telling me that I can't access their site.

How did I perform this test?

1. I opened the ANN threads of 10 casinos that were on the top of the list in the Gambling board.
2. I read the casino's TOS to find information about which countries are restricted.
3. I used a VPN to access the casino to test whether or not there was an active IP block from restricted countries.
4. I did not register a new account, but I clicked on the register buttons to see if it worked.

What now?

If someone's country is restricted from playing at a certain casino, citizens of that country shouldn't be able to register and deposit money to it. There should be an IP ban as soon as you load the site in your browser.
I am planning to notify the casinos who failed the tests.
I will do more tests in the next days and when I have more time and post the results.


Local Rules 

1. This is not a topic to discuss your favorite casinos, games, promotions, sports, etc. I will self-moderate the thread and delete any posts that promote/attack certain platforms.
2. You are free to do your own tests and post some results, as long as you were successful in accessing a site from a restricted location.
3. Keep the discussion nice and clean. 


If you have any suggestions, don't hesitate to let me know.
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