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1  Bitcoin / Bitcoin Discussion / Legal ransomware ? on: August 16, 2018, 12:08:33 AM
Hi,

Anyone else learn about CZIP.ORG ?

It's described as crypto archiver and offer users to archive and crypt their files/folders, and then decrypt using Cryptocurrency Payments !

Is it innovative idea for you ? Bad or Good thing for crypto community ?

A ransomware friendly software for commercial use !
2  Bitcoin / Bitcoin Discussion / You can now buy and sell Bitcoin with Skrill (In the official website) on: July 25, 2018, 07:04:02 PM
Skrill tweeted:

Quote
We know lots of people want to experiment with #cryptocurrency trading but donít know where to start, so we made the entire process easy. We're pleased to announce you can now buy and sell Bitcoin, Bitcoin Cash, Ethereum and Litecoin with Skrill. More: https://bit.ly/2mJtCDK

https://twitter.com/skrill/status/1022049398765875200
3  Bitcoin / Bitcoin Discussion / Samsung start to accept Bitcoin on 3 countries on: July 22, 2018, 02:19:55 PM
Samsung is reportedly accepting cryptocurrency payments in several Baltic States using Copay.

The Lithuania-based company made the announcement today. Customers in Tallinn, Riga, Vilnius, and Kaunas in the countries of Estonia, Latvia, and Lithuania will be able to purchase Samsung smartphones, tablets, laptops, TV sets, and more with cryptocurrency.

The full list of countries from here:
https://coppay.io/merchants_map

Article:
https://medium.com/@CopPay/samsung-stores-accept-cryptocurrencies-via-coppay-56f318364fe2
https://unhashed.com/cryptocurrency-news/samsung-cryptocurrency-payment-methods-three-countries/
https://coinjournal.net/samsung-accepts-crypto-payments-in-three-baltic-states/
https://news.bitcoin.com/samsung-stores-in-the-baltic-states-now-accept-cryptocurrencies/
https://smartereum.com/25408/cryptocurrency-payment-samsung-stores-in-baltic-states-now-accept-payment-in-cryptocurrencies-samsung-blockchain-news-today/
4  Bitcoin / Bitcoin Discussion / BMW now accepts Bitcoin as a payment! on: July 20, 2018, 03:21:29 PM
I bought my BMW 5 Bitcoins. This is the type of sentence that will be heard soon, major players that support Bitcoin are more numerous, mainstream adoption approach.

Quote
Stephen James is now accepting Bitcoin for the purchase of your new BMW! Contact us today to find out more about how you can use Bitcoin to walk away with a brand-new Vehicle


Read more here: https://news.crypto-analyse.com/en/2018/07/20/bmw-now-accepts-bitcoin-as-a-payment/

And here:
https://cryptodaily.co.uk/2018/07/bmw-now-accepts-bitcoin-as-payment/

Here:
https://usethebitcoin.com/stephen-james-bmw-accepts-bitcoin-payments-for-car-purchases/

Official tweet from Stephen james company:
https://twitter.com/SJBMWGroup/status/1014887028746571777
5  Economy / Exchanges / Bitcoin is trading at 9000 USD on WEX.NZ (BTC-E owners) ? on: July 20, 2018, 02:29:44 AM
Hi,

Bitcoin is trading at 9000 USD right now on WEX.NZ, while on other exchange plateform it turn around 7400/7500 USD.

Do they have problem or anything ?
6  Bitcoin / Press / [2018-07-19] Bitcoin Price Has Bottomed, According to Barry Silbert on: July 20, 2018, 01:14:21 AM
Bitcoin price has found its bottom, according to early Bitcoin investor and Founder & CEO of Digital Currency Group, Barry Silbert.

Continue reading here: https://bitcoinist.com/bitcoin-price-bottomed-barry-silbert/
7  Bitcoin / Press / [2018-06-10] Korean crypto exchange Coinrail loses over $40M in tokens on: June 10, 2018, 06:17:40 PM
Another day, another crypto hack. This time it’s Korea, the crypto-mad Asian country, where an exchange called Coinrail lost more than $40 million in altcoins, ICO-issued tokens that aren’t bitcoin or Ethereum, after it was hit by an apparent attack over the weekend.

Korea may be a hot spot for crypto investment, but Coinrail is one of its smaller exchanges, just about ranking inside the world’s top 90 based on trading volume, according to coinmarketcap.com. Nonetheless, even the smaller exchanges have plenty of coins, as the size of this heist illustrates.

Most notably, the hackers got away with $19.5 million-worth of NPXS tokens that were issued by payment project Pundi X’s ICO. Added to that they scored a further $13.8 million from Aston X, an ICO project building a platform to decentralize documents, $5.8 million in tokens for Dent, a mobile data ICO, and over $1.1 million Tron, a much-hyped project originating from China.

That’s according to a wallet address that has been identified as belonging to the alleged attacker, who also got hold of smaller volumes of a further five tokens from Coinrail.

In all the cases, the companies issuing the tokens themselves were not hacked, the tokens that were nabbed belong to Coinrail users.

Continue reading >> https://techcrunch.com/2018/06/10/korean-crypto-exchange-coinrail-loses-over-40m-in-tokens-following-a-hack/

Another source from here:
https://www.forbes.com/sites/chuckjones/2018/06/10/bitcoin-bitcoin-cash-ethereum-ripple-other-ccs-fall-5-or-more-as-south-korea-exchange-hacked/#73bda70358a6
8  Bitcoin / Bitcoin Discussion / Bitcoin under 7000$ because of exchanger hacked on: June 10, 2018, 06:11:04 PM
South Korean cryptocurrency exchange Coinrail said there was a "cyber intrusion" in its system.

And they losses over 40 Millions $ of altcoins.

And this caused Bitcoin price decrease.

Notice that almost all alcoins prices are decreased by 10% or above for some of them, check https://coinmarketcap.com/ please.

Here is the the wallet of the hacker: https://etherscan.io/address/0xdf9191889649c442836ef55de5036a7b694115b6#tokentxns
9  Bitcoin / Bitcoin Discussion / Other cryptocurrencies follows same graph as bitcoin, what is your opinion? on: June 10, 2018, 03:34:06 AM
I noticed on coinmarketcap that many cryptocurrencies follows almost same graph as Bitcoin.

What is the reason behind this in your own opinion ?
10  Bitcoin / Development & Technical Discussion / How strong is Bitcoin against 51% attack ! on: June 09, 2018, 10:28:24 PM
In order to calculate how much money do you need to perform a 51% attack on bitcoin:

Current hashrate (Total network hashrate): 36349358,259 TH/S (From https://blockchain.info/stats)

We choose our miners from here:
https://en.bitcoin.it/wiki/Mining_hardware_comparison

Let's take for example: Antminer S9
Hashrate = 14 TH/S
Consumption = 1.375 kW


Cost of harwares:
Hardware = Current hashrate * Price of Antminer S9 / Hash produced by Antminer (per seconds)
Hardware = 36349358,259 * 2400$ / 14
Hardware ~=  6,231,318,559 $

Number of antminers = Hardware / 2400 ~= 2,596,382


Cost of electricity:
Electricity consumption per day = Number of antminers * consumption * 24
Electricity consumption per day = 2,596,382 * 1.375 * 24
Electricity consumption per day ~= 85,680,606 kWh

Electricity cost per day = Electricity consumption per day * Cost per 1kWh
Electricity cost per day = 85,680,606 * 0.045$ (Electricity pricing - Depend on countries)


So attacker have to pay 3,855,627 $ of electricity per day !

This without make calculation of transport, renting or buying local where to install all this stuff, without counting the difficulty to get this number of miners and electricity power required to get them working all.

And counting the risk that the attack will not be a success and many other factors ...

If you want to know more about Difficulty and Hashrate: https://en.bitcoin.it/wiki/Difficulty

I made calculation 2 days ago from here:
https://bitcointalk.org/index.php?topic=4429114.msg39597354#msg39597354

In the space of two days, we can see this changes:
Hardwares:
Today = 6,231,318,559 $
2Days ago = 5,936,594,032 $

Difference ~= 294,724,527$
Additional AntMiners ~= 122,802


Electricity:
Today = 3,855,627$
2Days ago = 3,673,266$

Difference ~= 182,361$

In the current state of things, it's near impossible to attack Bitcoin ! This show how this coin is strong now.
11  Other / Off-topic / Keep up to date with new security updates to protect your coins on: June 09, 2018, 03:56:15 PM
Hi, just some advices to protect yourself from new attacks since each time someone discover a new 0day exploit to make a mass attack etc.

I suggest you to check regulary this website:
https://thehackernews.com/

And disable any addon added to your browser like: Adobe Products (PDF Reader, Flash etc.), VLC, and any other one.

Prevent yourself from installing random programs or files on your computer, check always the SHA signature if it's the original one.

And finally prevent access to any website that may look suspect.

It's good to remove any wallet from your PC, and store it else where like USB and protect it with strong password using ZIP file (You can crypt it twice with different passwords) ... or using encryption like AES etc.

Recent ZeroDay exploits you have to check and update asap:
https://thehackernews.com/2018/06/flash-player-zero-day-exploit.html
https://thehackernews.com/2018/06/google-chrome-csp.html


12  Bitcoin / Bitcoin Discussion / Cryptocurrency boost: Slovenia creates first bitcoin city in the world on: June 09, 2018, 04:14:13 AM
SLOVENIA is set to open a bitcoin city in its largest shopping mall in Ljubljana, where customers can pay for goods simply using bitcoin and cryptocurrency, operating via blockchain technology, in a world first.

Good news for Bitcoin and cryptocurrency world !

I invite you to read the full article from here:
https://www.express.co.uk/news/world/971527/bitcoin-news-slovenia-bitcoin-city-Ljubljana-cryptocurrency-btc
13  Bitcoin / Bitcoin Discussion / Why the word PURSE not used a lot in cryptocurrency world than WALLET? on: June 06, 2018, 08:58:59 PM
Hi,

We everytime see new products coming with the term: WALLET, and this one is the most used in the cryptocurrency world !

When we see PURSE is less used.

What is the real difference to favorite WALLET than PURSE ?
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