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3161  Other / Beginners & Help / Re: Crypto criminal activities. on: September 28, 2020, 10:46:36 AM
I see the effort of creating the thread, but there are 2 important things you need to empathize :
1. All those criminal activities are exist before cryptocurrency exist and can be done with fiat
2. Blockchain offer some privacy by default, but it doesn't offer anonymity (unless you coin such as Monero), but only pseudonymity. Additionally government could track someone's coin on easily.
3162  Bitcoin / Bitcoin Technical Support / Re: How to create weird bitcoin addresses? on: September 27, 2020, 11:55:26 AM

Vanity address generator aren't capable to generate address with so many prefix
3163  Bitcoin / Development & Technical Discussion / Re: A Look at Innovation in Bitcoin’s Technology Stack [complete with references] on: September 26, 2020, 11:45:38 AM
A very good news for everyone running a bitcoin node.
Due to patent expiry, from next bitcoin core major release the activation of a new technology to cryptographically verify signatures will enable an improved performance of about 10% (conservative estimate) in the IBD and block verification.
This feature has always been present in bitcoin libraries, but it was defaulted off just to avoid patent litigations.

--snip--

As additional references, it's also discussed at [validation performance] ECDSA GLV endomorphism patent expires Sep 25th 2020
3164  Other / Meta / Re: Forum account: security, privacy, and recovery on: September 26, 2020, 11:16:11 AM
If you care about your privacy, you would use Tor but there is annoying problem with Tor
The Brave browser also has "Tor mode", you can add it to the description if you like.

Brave browser is not good as they have claimed to be since their start. They arbitrarily require KYC and implement shady things. Their reputation is damaged from their shady developments. I don't recommend Brave browser. If need privacy protection, do it by using Tor browser (the best) or FireFox.

Brave browser hijacking links and affiliate codes!
[SCAM]Archive.is has stopped supporting Brave Browser

Good point, but IMO it's still better than Chrome when you need to visit website that only works properly with Google Chrome, if you disable ALL annoying feature (BAT reward, exchange widget, etc.).
But i would use another browser based on Chromium such as https://github.com/Eloston/ungoogled-chromium.

If you care about your privacy, you would use Tor but there is annoying problem with Tor
The Brave browser also has "Tor mode", you can add it to the description if you like.

If you plan to use Tor, you better use Tor Browser.
3165  Economy / Reputation / Re: 🏆 Crypto Community Awards - Discussion on: September 26, 2020, 10:57:01 AM
--snip--
Could you tell us more about the algorithm?

Check Bumping changes on some boards. The algorithm significant reduce bump issue with alt account & people who bump thread as often as they can.
3166  Other / Meta / Re: Should we post for members or guests? on: September 24, 2020, 09:48:41 AM
it would be great if we had a section dedicated to discussing computer things; and if we had a section dedicated to programming and a section dedicated to video games.

Not sure about video games, but both computer hardware and software should have some quality since some bitcoiner are also computer nerd.

I upgraded Ubuntu on the netbook, and it has become more or less unusable. It doesn't recognise the WiFi adaptor, and it has disabled the keyboard. I did a bit of googling, but I've decided to bin Ubuntu, and switch to open SuSe as an experiment. It would be nice to have a board here where one could discuss these topics.

Debian usually keep driver for very old hardware, even though Debian recently removed very old driver (https://fossbytes.com/debian-gnu-linux-legacy-drivers-remove/).
3167  Bitcoin / Development & Technical Discussion / Re: Block and Transaction Propagation times on: September 18, 2020, 11:24:10 AM
Quote
nodes relay only the block header and hashed transactions to other nodes, instead of the complete block.

This optimization makes sense.

Quote
It only takes a 6 or so bytes per transaction on average to relay a block and the only processing needed is a bit of hashing.

Where do the 6 Bytes come in?  A transaction ID is a SHA256 hash of the transaction done twice, which is 32 Bytes. 

IIRC, compact block uses this https://en.bitcoin.it/wiki/Protocol_documentation#Short_transaction_ID
3168  Bitcoin / Electrum / Re: Connect Electrum to 3rd Party Node? on: September 18, 2020, 11:19:22 AM
I would recommend you to install and configure your own Electrum Personal Server [1] and use it from there.

You also can use ElectrumX (https://github.com/spesmilo/electrumx), which is more popular option to create Electrum server.
Someone also make ElectrumX installer (https://github.com/bauerj/electrumx-installer) to simplify things, but you still need to change few configuration.
3169  Other / Meta / Re: The captcha for logging in is impossible. on: September 18, 2020, 10:47:29 AM
I dunno, despite having a commercial pilot's license, maybe I don't know what an airplane looks like  Huh


--snip--

From the screenshot, i see you're using Brave Browser + Tor.

Try use Tor Browser instead since CloudFlare can detect if you use Tor Browser and would allow you access this forum directly.

There's actually a way to check if your IP address and browser combo is going to give you a bad reCaptcha score without solving any captchas. Go to this reCaptcha v3 testing page https://recaptcha-demo.appspot.com/recaptcha-v3-request-scores.php, look for the line that says "score" and check the number next to it. The closer it is to 1, the more human it thinks you are.
I've checked it with 3 different connections, one of them through Tor, and I always get the exact same score:
Code:
"score": 0.9,
I don't think this is working properly.

I think recaptcha algorithm changed over time, last time i uses that website with Tor Browser & i got score near to 0 most of the times.
3170  Bitcoin / Development & Technical Discussion / Re: Multisig with a twist on: September 16, 2020, 11:41:59 AM
Very interesting proposal, but a bit dangerous as well. If private key holder A refuses to sign...
Isn't that the whole point, though? If A is going to be the master* key, then if A refuses to sign there is nothing B or C can do about it.

Such a set up could be used for example with a business's funds so the manager/boss can, with the help of a single employee, release funds to that employee for some specific task or outgoing, but the employees can't conspire and spend money without the boss's oversight. It is essentially the same as setting up an x-of-y multisig, where the boss holds x-1 keys and the employees collectively hold x-1 keys.

*Probably best to find some other term rather than master key for this, to avoid confusion with master private/public keys. Perhaps mandatory key? Or owner key?

After reading your reply, i think 3-of-4 could be alternative of what OP looking for where a person have access to 2 private key A and B
3171  Bitcoin / Development & Technical Discussion / Re: How secure is this code to generate Address-Key pair? on: September 11, 2020, 11:43:52 AM
You need to audit security/cryptography expert to know how secure is it. I can't find anything that mentions audit on both source code and GitHub's issue feature.

If there's no particular reason to use that library, consider use https://github.com/bitcoin/bitcoin/tree/master/src/secp256k1
3172  Bitcoin / Development & Technical Discussion / Re: Developing a Simple Bitcoin Wallet on: September 06, 2020, 11:01:18 AM
2.A. SPV using bloom filters
This is a bit more decentralized and provides better privacy compared to the other type but it takes more effort and bad implementation of it could lead to privacy leaks.
BitcoinJ library (written in Java) and some of the SPV wallets that use it are using this method.

Bloom filter is practically useless to protect privacy, using Electrum protocol (if privacy isn't the main target) or using Neutrino (BIP 157) are better option.
Few LN wallet uses Neutrino, but the only non-LN wallet using Neutrino that i know is Wasabi Wallet
3173  Bitcoin / Wallet software / Re: Best IOS app to handle multiple wallets on: September 05, 2020, 11:39:03 AM
@OP You can also use Trustwallet if you're interested in watching multiple cryptocurrencies. Both importing wallets/watch-only are supported.

Take node that Trustwallet is closed-source wallet, which means it has less transparency compared with open-source wallet such as Bluewallet.
3174  Bitcoin / Development & Technical Discussion / Re: BIP-39 List of words in Portuguese ready for submission on: September 05, 2020, 11:29:57 AM
Good initiative, i hope it will be accepted quickly Smiley

I will try to make or find a Levenshtein distance script in python to check our list.

I would recommend Jellyfish library (https://pypi.org/project/jellyfish/) which have better performance (since it's wrapper of C library).
3175  Bitcoin / Project Development / Re: Let's build Dex? on: September 04, 2020, 01:11:26 PM
Rather than create another DEX, how about contribute to existing DEX such as Bisq?
3176  Bitcoin / Electrum / Re: Curious if many are using AppImage for Electrum as opposed to the full install? on: September 04, 2020, 10:54:34 AM
You could always setup your own Bridge on your own VPS. Make sure to enable obfs.

Yeah, I  could, but now I'm very reluctant to use TOR ( many reasons for this, actually, and I’d rather not discuss them publicly)  I'm better off with parallel VPN at the moment. But those who get used to TOR, definitely must utilize  obfs to obfuscate traffic.

Fair point, both VPN and Tor have it's own pros and cons.
3177  Bitcoin / Bitcoin Technical Support / Re: About Bitcoin Lightning Network and transaction fee on: September 02, 2020, 09:39:31 AM
Which means the transactions fee will be very small.

Direct payments are feeless, but you still have to pay for the channel opening and closing fee.
This is also reason why LN is hardly popular, since you would pay more or about same if you rarely make transaction (less than 3 transaction within the LN channel duration).
I have a suggestion, I think lightning network is fine and can be used for small payments, like paying for foods and drinks you order daily at a restaurant or paying at coffee shop. For instance, you open a channel with the owner of the a food restaurant where you eat daily after work, you can decide to spend 0.0003 btc daily at the reestaurant. You can open a channel with the owner of the food raustarant with 0.03 btc aside the fee you will use to open the channel. You can use this to order for food for months, making use of the bitcoin lightinig at a very reduced/low fee. I think this is still fine.

Good example, but finding merchant who sell something you buy daily (or even weekly) and accept LN is quite hard.

But, lightning network wallet that someone will be able to customize (edit) the fee will be good for such purpose.

Such option is limited to :
1. Setting on-chain transaction fee when open/close channel
2. Selecting route with lowest fees
3178  Other / Beginners & Help / Re: Trustworthy Free-Crypto Sites on: August 30, 2020, 12:04:08 PM
Faucets are worthless.
It really is not worth the time. You would be better off getting a job and buying bitcoin. Saves you tons of time and electricity.

Get a job? Even beggar could earn more money than people who collect satoshi from faucet.
3179  Bitcoin / Hardware wallets / Re: Nano Ledger S Won't Turn On Help on: August 30, 2020, 11:27:51 AM
Well what other ways can i try to see if it turns on?  I plugged it multiple times into my laptop usb port and it doesn't work.

That depends on OS you use, on Linux usually i would use command lsusb before and after plug an USB device.

On Windows, you should able to check it with Hardware Manager, but i'm not 100% sure (since i usually use Linux).
3180  Bitcoin / Development & Technical Discussion / Re: Ultimate Solution to 51% Attacks: Amend the Nakamoto Consensus on: August 28, 2020, 11:29:00 AM
I don't really understand how it works, so i'll just ask a layman question, how does this solution prevent sybil attack where majority node is controlled/owned by malicious actor?
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