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June 22, 2021, 07:12:32 PM *
News: Latest Bitcoin Core release: 0.21.1 [Torrent]
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1  Bitcoin / Bitcoin Discussion / Re: Satoshi Statue in Hungary on: June 03, 2021, 02:08:55 PM
Satoshi: I better stay anonymous, so they don't worship me as an idol.
Hungarians: I know! Let's turn him into a statue!
2  Bitcoin / Development & Technical Discussion / Re: BIP0032 Hierarchical Deterministic Wallet key generator bip32utils (Python) on: August 20, 2014, 08:34:18 PM
Can you describe like I'm 5 how can I get the first address of the first account with this tool according to BIP-0044 given I know the xpub?
It should be m/44'/0'/0'/0/0
3  Bitcoin / Hardware wallets / Re: [ESHOP launched] Trezor: Bitcoin hardware wallet on: August 20, 2014, 04:44:13 AM
What is the guarantee that will always be around for me to be abel to spend/receive bitcoins using the Trezor?

In 30 years, will that website still be around? 

Trezor support for electrum is already present (it's just not stable yet). You can already try it

I would like to return my trezor and get a refund of my 3 BTCs how can I do this? Obviously they aren't going to fix the mytrezor web wallet and I want my money back.

Edit: Talked to my lawyer about this, and he said there should be no reason that a refund should be an issue. I would also like to use escrow to make sure they don't stiff me.

What problems do you have on your mind? I'm only aware of small inconveniences. Nothing that would prevent me from using it.
If you have the metallic one, I bet many people would be glad to buy it from you. Obviously not for 3 BTC though.
4  Economy / Goods / Re: [WTS] 1st Generation 8GB Nexus 7 on: August 05, 2014, 03:09:15 AM
Good enough. Still best offer on the internet as far as I can tell.
Is this you?
5  Economy / Goods / Re: [WTS] 1st Generation 8GB Nexus 7 on: August 05, 2014, 01:58:39 AM
Looks good. As long as the postage to Slovakia do not exceed like $18, I might take it. Is it realistic?
6  Bitcoin / Hardware wallets / Re: Trezor: Bitcoin hardware wallet on: August 04, 2014, 04:12:30 AM
so i have a few questions / concerns. I love the product and the signing transactions without a hot wallet loading a key, but I want to be sure its a good method for cold storage security.

1) if the trezor breaks or is stolen it can be recovered by a 12word seed. How can i secure this code so that it cannot be stolen and used to take access from a different trezor?
2) what measures are in place to detect / prevent lo-jacked trezors or malicious code/components?
3) does the trezor retain access to all its addresses and change addresses? Can I constantly reload it to the same address without compromising the coins?
4) how does the trezor generate an address - could it be replicated based on the physical design?
5) can the trezor wallet be accessed using the seed but not another trezor? What if trezor goes out of business and you cannot buy a new trezor to load with the seed?
6) I heard a single trezor can hold multiple distinct wallets under the same seed but different passwords. How could I set that up to store spending quantities seperately (and secretly) from my long-term storage address?

I want to use this as a fuctional backup for the majority of my bitcoin funds, with the seed safely stored in a few offsite files/safes and some safeguards (password?) on those. I want it to act as the payment address for my mining and not worry that it may not be accessible if something happens to the trezor or trezor support.

1) It's up to you to properly secure the paper backup. You can also memorize the seed if you have good memory but it's 24 words now by default Smiley If you choose to use the pass-phrase, the 24 words alone cannot be used to access you coins.
2) The official firmware release is signed by the developers. If someone try to put the custom firmware on your Trezor you will see the warning on the screen.
3) Addresses are generated deterministically. While using the same seed & passphrese your Trezor will always have access to the same keys. Regarding the address re-using, standard recommendations applies. It's possible, but not recommended. You will not loose your bitcoins but you may loose some privacy.
4) Way that Trezor generate the keys from master private key is described by BIP-0032. The master private key itself is generated using entropy that device can provide itself with entropy provided by your PC. The master key is then represented by the 24 words from dictionary defined in BIP-0039
5) You can use any compatible software wallet. All you need to do is enter your seed and pass-phrase. Currently there is only Wallet32 for android, but support for Electrum, Multibit and Armory is coming.
6) If you already initialized your Trezor with a passphrase, just enter a different one in the "log-in" process. Depending on what pass-phrase you enter, you will get access to different wallets. But you can also have multiple accounts under one passphrase (although all of the accounts corresponding to specific pass-phrase are visible so it's only good for separating the funds instead of hiding them)
7  Other / Beginners & Help / Re: Is it normal that Bitcoin Core wallet takes hours to verify blocks and start? on: June 24, 2014, 08:58:33 PM
Check the debug.log to see if it's doing something.
8  Economy / Trading Discussion / Re: remember Tradehill? on: June 09, 2014, 11:25:43 PM
9  Other / Beginners & Help / Re: Can someone explain what happened? on: March 19, 2014, 02:32:54 PM
10  Bitcoin / Development & Technical Discussion / Re: Potential attack by solo mining a long chain? on: March 13, 2014, 02:35:31 PM
No, because blockchain length is not the only important factor. Chain with higher difficulty will win.
And there are also hardcoded checkpoints in every bitcoin client release.
11  Bitcoin / Hardware / Re: Please help me understand this... on: March 13, 2014, 11:41:42 AM
Companies like BFL and CoinTerra are designing the chips to calculate hashes efficiently. Other companies like Global Foundries and TSMC are physically making those chips, based on design from them.
12  Other / Beginners & Help / Re: 10 000 000 GH/s and rising on: December 27, 2013, 02:02:23 PM
miners couldn't keep up with the blockchain difficulty
Such thing cannot happen. Difficulty depend on hash power. If hash power decrease, difficulty will decrease as well.
13  Bitcoin / Bitcoin Technical Support / Re: Can anyone move my BTC using an old backup and old password of a wallet? on: December 18, 2013, 02:59:10 PM
It's possible. If there are some unspent outputs on old keys included n that backup.
To be 100% sure the old backup cannot be used to steal some (or all) of your money, just create the new one and send all the coins to it. But keep the old one in case someone send you bitcoins to one of the old addresses.
14  Bitcoin / Bitcoin Discussion / Re: Does the general public know they can buy fractions of Bitcoin? on: November 17, 2013, 07:48:10 AM
I was absolutely shocked after I discovered that some well educated people working in IT thought bitcoin isn't devisible. I wasn't taking this psychological "coin" aspect seriously in the past, but now I am pissed every time I see the animated spinning coin on the TV screen.
15  Other / Beginners & Help / Re: TradeFortress stole 30 of my BTC on: November 07, 2013, 05:10:52 PM
How could anyone use and sleep well at night remains beyond my imagination.
16  Bitcoin / Pools / Re: Defending against Selfish pools with BFGMiner and GBT on: November 06, 2013, 12:28:32 PM
I don't own any blades or KNC, but with BFL and few USB erupters it's working pretty fine.
And I'm running it on an old laptop. Uptime of the machine is 88 days now, bfgminer 39 days.

Setting up the p2pool itself was easy, most complicated part for me was the automation (like auto-restart of all mining related processes), and if anything happens (long term power outage for example), all I need to do is push the button and everything will start itself in the right order.
The only drawback is my crappy and unstable DSL connection. As soon as enough peers connect to me, it crash and come up with new IP address.

To get back on topic, I wasn't aware of this feature of GBT protocol in combination with solo fallback. It's brilliant .
Disadvantage of GBT is higher load on both sides (pool and miner), so I'm not sure that pools will support it if significant part of the miners switch to it.
17  Bitcoin / Bitcoin Discussion / Re: Bitcoin Is Broken on: November 06, 2013, 12:33:14 AM
Well, if "selfish" mining strategy is more profitable then the "honest", everybody will (in theory) switch to it so they can compete with each other. However, this technique hugely depends on luck while trying to propagate competing block through the network which will not always be successful.
18  Bitcoin / Hardware / Re: this circuit is good for use? (bitfury chip) on: October 28, 2013, 05:58:52 PM
Raspberry pi shield with just a few chips would be great. Avivmas, if you do that post the pictures.
19  Bitcoin / Project Development / Re: BAMT version 0.5 - Easy USB based mining Linux with farm wide management tools on: October 27, 2013, 11:53:36 PM
Since all the mirrors are down, I have decided to upload my copy rescued from old hdd backup.
It will take few hours to upload Sad

[deafboy@Planetexpress Download]$ md5sum
[deafboy@Planetexpress Download]$ ls -la
-rw-r--r-- 1 deafboy deafboy 531867918 mar  5  2012
[deafboy@Planetexpress Download]$

Download here

I'm unable to upload it. My DSL connection crash every time I try. :/
20  Bitcoin / Development & Technical Discussion / Re: Vanitygen: Vanity bitcoin address generator/miner [v0.22] on: October 26, 2013, 05:35:14 PM
I have strange problem using vanityminer on windows 7

C:\Users\Deafboy\Apps\vanitygen>oclvanityminer.exe -p cypress -d 0 -u "" -a 163fnJCLCX9R3x6XHsAcSRD2hnbD2cvP4P
Invalid character '     ' in prefix '                   ga.src = ('https'
Invalid character '     ' in prefix '                   ga.src = ('https'
No work available, sleeping

Should have used oclvanityminer64.exe and URL without /getwork
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