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News: ♦♦ Bitcoin Core users must update to 0.16.3 [Torrent]. More info.
 
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981  Bitcoin / Electrum / Re: Electrum vulnerable to Meltdown ad Spectre CPU attacks? on: January 05, 2018, 05:41:16 PM
first of all thanks for asking this, it made me to finally go and read about this attack Tongue

from what i understand, these two attacks can pull data from your RAM, the secret data that shouldn't have been accessible otherwise. they are not much different from other viruses out there. the impact is different and protection is similar, update your OS (windows[1] and linux) update your antivirus and make sure to use the latest version of your browser [2].

now as far as bitcoin is concerned, that is why we have "cold storage" [3][4].
as for Electrum, the way it is designed is that it doesn't keep "sensitive information" (secrets) in memory. so even if you have your Electrum open there is nothing in memory to steal. BUT it will be there at some point, the only time your "secrets" go in memory is when you try to sign something (transaction or message,..) that is why you are asked to enter your password when you try to sign.


[1] https://support.microsoft.com/en-us/help/4056892/windows-10-update-kb4056892
[2] http://www.pcgamer.com/google-is-prepping-a-chrome-update-to-mitigate-newly-disclosed-cpu-exploits/
[3] https://en.bitcoin.it/wiki/Cold_storage
[4] http://docs.electrum.org/en/latest/coldstorage.html

So if I am using a second PC offline which signs the messages there shouldn't be an issue?

But what if that offline PC is also running an Intel CPU?

Can it somehow send private data by the QR code right after it signs the transction?

I read some articles and some of them mention that it should be fine since both of them (Meltdown and spectre require executing malicious code on a target machine), furthermore some OS already/will release patch for both vulnerbility.
Just make sure the offline PC is clean/secure.

More info/source :
https://www.anandtech.com/show/12214/understanding-meltdown-and-spectre
https://thehackernews.com/2018/01/meltdown-spectre-patches.html
982  Bitcoin / Bitcoin Discussion / Re: Multiple Bitcoin debit card providers suspend service under orders of Visa on: January 05, 2018, 05:25:29 PM
Not really surprised since many banks, government and financial institution are concerned with cryptocurrency's freedom, anonymity or/and encryption. Fortunately i don't use this kind of debit card anymore, but many people would be angry that their time and money is wasted just to withdraw their fiat/bitcoin.
But i bet the real reason is they don't want to let bitcoin grow and become more competitive.
983  Alternate cryptocurrencies / Mining (Altcoins) / Re: List of Coinn Can Mine on Raspberry Pi on: January 05, 2018, 04:59:16 AM
Check this website : http://cpucoinlist.com/
If you need mining software, just search the one with linux/android support. You also can find plenty of guides about mining in most forum.
984  Bitcoin / Development & Technical Discussion / Re: Decrease overall difficulty would solve the scaling problem? on: January 05, 2018, 04:51:55 AM
There's no correlation between bitcoin mining difficulty and scaling problem/solution.

To face the scaling problem, why don't we decrease overall difficulty to generate blocks more often?
Theoretically, the new block of Bitcoin should be added every 10 minutes. If the miners will add blocks more often, the current difficulty will be re-calculated and, of course, be increased.
In this state yes but with an update to the bitcoin core?

In other terms, why we don't reduce the block generation time to reduce the scaling problem?

Reducing block generation time will leads to another problem such as block orphan and require better bandwitch/processing power.

If you curious, we already have other solutions such as SegWit (already used, but low adaption rate), LN & Schnorr signature.
985  Economy / Service Discussion / Re: Overview of Bitcointalk Signature-Ad Campaigns [Last update: 31-Dec-2017] on: January 05, 2018, 04:38:59 AM
Aida Signature & Avatar Campaign now is CFNP/PYNC, but looks like they use trusted escrow.

https://bitcointalk.org/index.php?topic=2664813.msg27490023#msg27490023

Bitotal now is FLUX, they don't specific how many slots are open though.

Open for new registrations again.
Please read the rules before apply. Thanks


AiDoc Signature Campaign has ended

Do take note that the campaign has ended. However you are supposed to keep your avatar and signature code for another day for me to do the checking. Thanks for everyone patient.
986  Alternate cryptocurrencies / Altcoin Discussion / Re: If #Ripple becomes number 1 on: January 04, 2018, 09:19:50 AM
Core "best programmers in the world" are to blame.
Why and how are programmers in the world to be blamed?
They supposed to increase block size and not cripple bitcoin with high fees. Whole community suffer from centralization of bitcoin development. Ripple, for sure, centralized coin, and banks can do with XRP anything they want. Bitcoin heavilly centralized too, blockstream developers can change bitcoin software the way they want. Today it's $50 fee, tomorrow it can be changes to BTC supply plan.
How about you do your research first since you got the facts wrong :
1. Block size concept has been replaced with block weight. SegWit have less weight size which means more transaction can fit into a block.
2. With Block weight, we can see maximum block size up to 4MB.
3. If majority adopt SegWit, pending transaction and fees will be reduced a lot
4. Bitcoin is still decentralized, if you compare it with Ripple
5. No one would agree when developer propose extreme change.

More info/source :
https://hackernoon.com/bitcoin-owners-you-need-to-do-these-two-things-right-now-a73122dd23d4
https://www.reddit.com/r/Bitcoin/comments/7mk8az/day_5_i_will_post_this_guide_regularly_until/
https://medium.com/@jimmysong/understanding-segwit-block-size-fd901b87c9d4
https://en.bitcoin.it/wiki/Block_weight
https://bitcoin.stackexchange.com/questions/54726/what-is-block-weight-and-how-is-it-different-from-block-size


How about the part where The company hold majority of the coins?
987  Bitcoin / Bitcoin Discussion / Re: Difference Between Blockchain and Cryptocurrency on: January 04, 2018, 09:02:46 AM
Blockchain is continuous growing database which secured with cryptography. Cryptocurrency is form of currency which use cryptography technology, most of them use Blockchain technology, but few use DAG technology instead Smiley

More info/source :
https://en.wikipedia.org/wiki/Blockchain
https://en.wikipedia.org/wiki/Cryptocurrency
https://en.wikipedia.org/wiki/Directed_acyclic_graph
988  Bitcoin / Bitcoin Discussion / Re: Bitcoin Losing Relevance? Dominance at All Time Low on: January 04, 2018, 05:51:24 AM
Bitcoin still relevance and all it's problem will gone when people/services use SegWit and LN is ready. Bitcoin dominance may be at all time low, but that's because some altcoin got hyped just like Bitcoin few weeks ago.
989  Alternate cryptocurrencies / Altcoin Discussion / Re: People really are stupid buying Ripple. on: January 04, 2018, 05:47:15 AM
People only care about profit and they think Ripple price still can rise, but other coins will have same fate (it's price could crash anytime) and people still buy those coins anyway. But if i'm right, some banks and financial institution already use/support/backed Ripple, so that's the reason Ripple got all the hype.
990  Alternate cryptocurrencies / Tokens (Altcoins) / Re: [ANN][Pre-ICO] - AIDA P2P service | First Interactive Sale on: January 04, 2018, 04:52:06 AM
Hi,

Just saw your whitepaper and i'm really interested, but 5% fee looks big (Page 29). Is it fee for preparation of goods, delivery, infrastructure or profit?
991  Economy / Services / Re: [Open] Aida ☮ Signature and Avatar Campaign ☮ on: January 04, 2018, 04:02:02 AM
Bitcointalk Username: ETFbitcoin
Rank: Legendary
Current post count: 5151
BTC Address : 19jTYQu6g7vWdqkGB2pdgbtt5JkA6sYiv2
BTC (SegWit Bech32) address : bc1qvu73plgh739wrr9zgtu2j7grx6l3fjad3x0vwr

If i'm accepted, i hope you can pay to SegWit Bech32 address Smiley
Also, i can fullfill the condition even though i usually posts in different sections.
992  Bitcoin / Development & Technical Discussion / Re: Is the only difference between BTC and BCC the 8 MB block? on: January 04, 2018, 03:59:39 AM
This is a nice thread. I also wanna ask if one can transfer one's coin from BTC to BCC and vise versa.

Obviously not since they have different network, BCC have replay protection and now they have different technology/address format. However, you can sell your BTC for BCC and vice versa if you wish to. Using instant exchange https://shapeshift.io/ isn't bad option either.
993  Bitcoin / Development & Technical Discussion / Re: Is the only difference between BTC and BCC the 8 MB block? on: January 03, 2018, 05:45:34 PM
...
Well said, except that 0-conf was never viable; and that’s not a blocksize issue.

...

I agree that 0-confirmation transactions were never really secure. However,
many operators had a business model that was based on 0-conf transactions
(e.g. the now defunct betting site Directbet). Therefore something seems
to have changed, because otherwise these operators would still be able
to use 0-conf transactions.

I canīt imagine that this is only due to increased fraud by people attempting to double-spend
a gambling transaction (e.g. double-spend after their bet already lost on Directbet). There has
to be a technical explanation why 0-conf transactions are not widely used anymore
when that was still the case in 2014-2015 (at least at Bitcoin gambling sites).



Satoshi said that 0 confirmation transactions were never to rely upon, or at least he literally considered 0 confirmation users as "second class citizens" in the bitcoin network:



It's not clear to me if he had 0 confirmations to be part of the network model. Big blockers often argue that 0 confirmations are perfectly fine and the only reason they aren't now is due the blocks not being big enough. 0 confirmations never made any sense to me. Maybe for smaller transactions, but I would rather trust an LN channel than a 0 confirmation transaction.

0 confirmation is very secure & trustable for micro-transaction as long as the user put enough fee to make sure transaction can be confirmed quickly. In past many services, especially on-chain bitcoin casino/gambling accept 0 confirmation.

Does the absence of 8 MB block imply inadequacy in decentralized crypto currency or does it make it even
more centralized?If the coders are reliable, does the  8 MB lag pose any threat that could raise any doubt of
non-performance?

Increasing the blocksize ALWAYS come with a centralizing factor, since the rule of "the bigger the blocksize, the harder to host your own node" always applies, therefore, you want to avoid raising the blocksize for as long as possible.

Reducing on-chain size with segwit and Schnorr sigs et al are ways to go around this, some consider anything but legacy transaction not safe, then again, if you don't consider that safe, you can't be a BCashier pretending BCash is a better idea.

If i'm right, SegWit and Schnorr sigs supposed to reduce transaction size, not on-size (aka block size). CMIIW.
994  Bitcoin / Bitcoin Discussion / Re: Is Bitcoin affecting the Environment on: January 03, 2018, 09:24:17 AM
No, bitcoin don't affect the environment. But the greed of miners is the one which affect the environment, especially the one who don't think using clear energy source Roll Eyes
But all of it can be changed if community agree to change PoW with other algorithm.
995  Economy / Services / Re: ♠ BETCOIN.AG ♠ Fixed Signature Campaign - Monthly Payments - No Free Spots ♠ on: January 02, 2018, 11:40:34 AM
Hi,

I'm interested joining your Signature Campaign again. I've put the signature and avatar. My betcoin.ag account is ETFbitcoin. Looking forward for your response soon, thank you. Smiley
I also sent a PM few hours ago.


On second thought, i won't join this signature campaign. Sorry for the inconvenience.
996  Bitcoin / Bitcoin Discussion / Re: How to verify that a BTC wallet address is legit and valid on: January 02, 2018, 08:37:12 AM
Most wallet have built-in Base58/Base64 checker to verify you input the right bitcoin address, so you don't worry about sending bitcoin to invalid bitcoin address Smiley
Also, all wallets surely will generate valid bitcoin address.
997  Economy / Services / Re: Campaign managers, time to use Segwit and require your posters to use it too on: January 02, 2018, 08:30:07 AM
I have been doing a little research on signature campaign payments, which are always small, and I have seen that some campaign managers have been delaying payments because the fees are too high.

I believe this is a good time to start using Segwit enabled wallets to help lower the fees and to make transactions confirm faster.

Stop using Blockchain.info and start using Green Address, https://greenaddress.it/en/. It has Segwit enabled.

For Electrum users you can create a new Segwit wallet with the more accepted "3 addresses" by using the instructions below.

Quote
Generate a BIP39, 12 words seed on https://iancoleman.io/bip39/, you can also use it offline for more security.

On electrum choose, create new wallet, I already have a seed, then on "options" choose BIP39, paste the seed then click next.

On derivation path path use: m/49'/0'/0'/0

For mobile wallets, use Samourai wallet. They have a working Alpha.

I too believe the same and already started using an segwit enabled Electrum wallet. I have already generated an address which starts with "bc1". However, whenever I am trying to use my coinbase wallet to send funds to that segwit enabled wallet, it is not recognizing the segwit address as a valid one. So coinbase is not allowing me to send funds to that address. Any solution can you provide? Needless to say, but I am facing the same issue blockchain wallet as well. 

It's coinbase fault, they don't have support over SegWit address, especially SegWit Bech32 Roll Eyes
998  Economy / Services / Re: Campaign managers, time to use Segwit and require your posters to use it too on: January 02, 2018, 05:57:45 AM
Good idea, expect the idea requiring the posters use SegWit as well. I think Campaign manager should prioritize those who have good quality posts and have SegWit/SegWit Bech32 address Smiley
999  Bitcoin / Development & Technical Discussion / Re: Will Bitcoin scale in 5-10years? on: January 01, 2018, 06:08:32 PM
Please do your research before ask since bitcoin already have scaling solution/future solution such as :
1. SegWit which have lower tx size which means lower tx fee. Also, maximum block weight can reach up to 4MB if everyone use SegWit.
2. Lightning Network which proved can manage million users/payment while keeping decentralization
3. Schnorr signature which lets multiple input only needs a signature

More info/source :
1. https://www.reddit.com/r/Bitcoin/comments/7na2xb/day_6_i_will_post_this_guide_regularly_until/
2. https://www.reddit.com/r/Bitcoin/comments/7mwag6/simulating_a_decentralized_lightning_network_with/
3. https://medium.com/@SDWouters/why-schnorr-signatures-will-help-solve-2-of-bitcoins-biggest-problems-today-9b7718e7861c
1000  Bitcoin / Bitcoin Discussion / Re: Trade in bitcoins at your own risk, Indian Finance Ministry warns users on: January 01, 2018, 06:05:08 PM
Not really good news, but it should be fine as long as people in India can use cryptocurrency as they want Roll Eyes
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