I'm not sure why you need CloudFlare when the profit from advertising is more than enough to rent entire serve racks. Is BitcoinTalk's revenue being siphoned off?
That would also not surprise me.
It's to prevent DDoS attack. It doesn't bother him that people who don't use JavaScript can't access BitcoinTalk.
And so most web owner in 2023. I don't expect anyone cares about user who don't use JS, unless they're government (such as https://gds.blog.gov.uk/2013/10/21/how-many-people-are-missing-out-on-javascript-enhancement/) or organization which specifically focus on easy accessibility/low barrier. |
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As they said --air-gapped smartphones are much safer than the air-gapped PC which are vulnerable to hacking, did you know that even fully air-gapped PC can exfiltrate information through the output radio signals generated by the computer or call [electromagnetism].
Also expert says that through [ultrasonic waves] a virus can be used to steal the private key out of the computer.
Unless you're high profile person, very important person or letting people know you're extremely rich, worrying about this kind of vector attack is pointless. Additionally, this kind of attack is also theoretically possible on mobile devices. One very good argument is that a burglar will most probably steal that smartphone even if it's older, put a SIM in it and turn everything on, making indeed phones somehow risky for cold storage.
Another very good argument is that somebody in the house would do exactly that too (put a SIM in) because of not knowing it's a "special use" phone.
But all this can easily happen with a laptop too (stealing or plugging in a network cable). And let's not compare online securit between old laptops and old phones because both are bad and also dependent of owner's skills in setting them up.
This could be partially mitigated by setting password on your device (both smartphone and laptop). And on certain smartphone or OS for laptop, the password could be used to encrypt whole storage. |
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how do you calculate the balance and the received amount on each address? If it's an API call then it should have some limits...
I did quick check using developer tools (F12 -> Network) on my browser and found out it use blockchain.info API. But since the API is called from our own browser, the limit should be based on your IP address.  This kind of game assuming this will become successful will create negativity in Bitcoin since leaving your balance on your wallet address is not safe.
I disagree, this kind of service is a proof Bitcoin cryptography is secure and can't be brute forced. |
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--snip--
How can a cold wallet be compromised? I thought the only way would be for the perpetrator to physically steal the cold wallet. Am I wrong? It depends on his cold wallet setup/usage. For example, using USB storage to transfer unsigned and signed transaction could be exploited by specifically designed malware. Maybe some quantum computer hacked his private key but why only go for 200btc when you could go for multiplies higher.
This is my biggest fear and the worst hypothesis for this case. Hackers having technology at their disposal to break the security of blockchain. The consequences of this would be much more impactful and harmful than a single person losing 200 BTC. It could be the end of bitcoin in this case, as no one would be safe anymore. It is said by 2030 quantum computers would be able to break encryption protocols, including of bitcoin. 1. It won't be end of Bitcoin if Bitcoin switch to quantum-resistant cryptography. 2. Bitcoin don't use encryption protocol, but digital signature and hash cryptography. |
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Let's make a contest-like game. Create a simple code like this and try to beat the high score of currently 4.7 seconds for 1million bech32 addresses without using GPU.
Since fastecdsa already utilize C for heavy operation, i doubt we can see major improvement without either 1. Modify some part of fastecdsa to use assembly. 2. Rewrite everything using C/C++/Rust and assembly. |
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I also use Tor (through Tor Browser) and experience same problem. It took 10 minutes to pass their "security check". Can't believe CF behavior changed during holiday session, it could give headache for some IT worker.
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Your link is broken/404. Can you post a screenshot on imgur or img.bb instead?  It's not exactly broken, OP accidentally click "Enter" few times. I remove the "Enter" and manage to see the images. This player was banned from our website for multiple attempts of fraud. He was also banned from our discord due to threatening and abusive messages.
Do you mind share additional information or proof? |
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Mining Bitcoin? Unlikely since only pool know your IP. Running Bitcoin node? More likely since your IP will be known to other node and appear on crawler website such as https://bitnodes.io/. Never mind this newbie-like question. Some people's location are unknown, are they those that uses Tor or VPN? If using Tor or VPN, you can set it to a country address, the country the Tor or VPN is set to will be displayed as the country set to? This later is how I thought it would be, but how come some location are unknown? When a node use Tor, usually it means they only use .onion address (doesn't use exit node) which prevent Bitnodes.io from guessing their country. And if those who run node with Tor for privacy reason, usually they don't configure their node to accept clearnet connection. |
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Will my home network become a target for hackers if I run a bitcoin node or run bitcoin mining from devices in my home network?
Mining Bitcoin? Unlikely since only pool know your IP. Running Bitcoin node? More likely since your IP will be known to other node and appear on crawler website such as https://bitnodes.io/. Would a VPN help or is it better to run bitcoin node / mining in a completely different network?
Both option could work, but i don't know how much security risk could be decreased. Besides, you need to trust VPN provider when we're talking about privacy. |
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Contabo is probably the most crypto-friendly host and not expensive too. Hetzner really shoot in our herz  I spend few minutes checking their website. While their server is cheap (compared with Linode or AWS), i disagree this provider is one of most crypto-friendly host when they don't accept cryptocurrency as payment method. We do not accept payments in cryptocurrencies such as Bitcoin.
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If the Bitcoin market goes down then mining will stop altogether.
I disagree. The difficulty will simply drop low enough for few miner able to continue mining at profit. Besides, i expect some Bitcoin enthusiast will start/continue mining to keep the network alive. I think you're overestimating LN as scaling solution. People who rarely make transaction (usually investor and holder) wouldn't bother use LN, unless they're willing to "lock" their Bitcoin on LN channel.
Possibly, or more people are going to keep their funds in their own wallets and then put them into massive LN routing services and use their wallets. Knowing they are not secure but neither is the cash in your wallet. So you keep your cold funds cold and your hot funds in a very insecure way, but not enough to matter. The idea of LN routing service is interesting. But looking at current condition where routing fee is very low, IMO it's not attractive enough for many people. |
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1. When I ask him to send demo (live link) he refused with copyright excuses.
This is definitely unusual. When he hand over the source code or binary to the buyer, there's always chance it'll leaked either due to hack or intentionally leaked by buyer. 2. He also told me ridiculous thing that he has 100% refund policy if something go wrong (When he accepts only Bitcoin)
It's not ridiculous, usually it means the seller would send the money back to you manually. Although it's obvious you have to trust the seller. I checked his thread and found out his software rely on end of life software. Update for Node.js version 10.x has been ended at 2021-04-30. Requirements
-OS: Linux or Windows (+SSH Access or terminal in windows).
-HDD Space: You have 2 Options:
-Using API Need 1 GB.
-Using BTC Full Node Need 300 GB.
-Node: v10x.
-NPM: v6x.
-Apache.
-SSL.
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Does this mean that you cannot check the balance of an address with Bitcoin Core and that the utility of connecting the hardware wallet to Bitcoin Core is to use that node to issue new transactions?
What i mean you cannot check blance of any balance quickly due to lack of index. But you still can do that by creating wallet which contain specific Bitcoin address or master public key. If you add one which already has past transaction, Bitcoin Core will need to rescan blockchain which could take some time. In electrum, you connect to the servers provided by other people and it allows you to choose the server manually.
If you want to protect your privacy, you should download the full blockchain and run your own server and use TOR.
How it's different to run Electrum with TOR connection? Network >> Proxy >> Use tor proxy at port 9150, Use proxy , SOCKS5 127.0.0.1 9150 Electrum server can know list of addresses belong to same person/group. |
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I'm not going to share my own view, but we should realize each married pair have it's own circumstance. For example, i expect people who marry primarily or partly due to peer pressure or to push off certain accusation will say no to this question. While for other people, it comes down to whether their partner willing to take such responsibility or have good security practice. In fact you could even take one step further and create a multi signature wallet with 2 seed phrases, one kept by the man and the other with the woman. That way the bitcoins and the wallet is truly shared.
2 seed phrase which means 2-of-2 multi signature wallet? Sounds risky to me if one of them lose their seed phrase. |
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What do you think will happen when the block reward subsidy is 1.5625 BTC in a little over 5 years?
Just like previous halving, some miner will stop their mining activity and sell hardware they no longer use while other's will continue mining with lower profit. LN really hurts BTC in the not so distant future.
I think you're overestimating LN as scaling solution. People who rarely make transaction (usually investor and holder) wouldn't bother use LN, unless they're willing to "lock" their Bitcoin on LN channel. |
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It is pretty hard to stay anonymous on the internet. Especially if you are a dev that has to work on a project all the time. Fixing bugs, creating updates all the time, sooner or later you will make a mistake and lose your anonymity. Hell, even if you do everything right, you still may lose your anonymity because some clever bastard may hack you.
That’s one of the weaknesses of crypto imo. Crypto itself is bullet proof but their devs aren’t.
Such problem could be partially migrated with security/privacy oriented OS such as Qubes OS. With proper usage separation between VM/Qube, it's less likely you'll make a mistake. Even if you're hacked, the hacker most likely only have access of the hacked VM/Qube. And considering cryptocurrency is bulletproof could trip you up in the future. |
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