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Be careful with only using 160 bits of entropy for private keys. The strength of ECDSA keys when the public key is known is half the key size. For full length key 256 bits length = 128 bits strength. So 160 bits mean 80 bit of strength. This is not beyond brute force. It may not be economical but brute forcing the private key from the public key is feasible.
This is often repeated around here, but are there any documented, non-theoretical examples of that? Not talking about in 10 years, but today? Not trolling. Do you have any sources for that claim? |
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I'm definitely not a developer. Just a guy with average computer skills.
Then IMHO it may be too early to rely on BIP38. I think it would be wiser to wait until more wallets add user-friendly support for it. |
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Good question... I would say that if you are a developer you will have no problems.
If you're not, well...
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Although this is an old thread, I felt it was appropriate to give a warning about the above script, as it has a bug that produces wrong results for some keys.
I will post more details and a fix when I have some free time.
Meanwhile, you guys can try to find it as an exercise...
Some technical knowledge of bitcoin is required.
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Bitcoins.com = Mark Karpelès (Tokyo) on 3/30/2000 (double wow)
WOW!!!!!!!!!!!!!!!!! Original bitcoins.com domain was registered by aanother individual, for project not related to "our" Bitcoin. Karpeles bought it later from him. OK, makes sense... Thanks. |
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Bitcoins.com = Mark Karpelès (Tokyo) on 3/30/2000 (double wow)
WOW!!!!!!!!!!!!!!!!! nice whoever got it must feel so nice Well that "whoever" is Mark Karpeles, the owner of MtGox!!!! Got it? |
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Bitcoins.com = Mark Karpelès (Tokyo) on 3/30/2000 (double wow)
WOW!!!!!!!!!!!!!!!!! |
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http://blockexplorer.com/Armory And there are a few others, I believe. I also have a little AHK script (which auto-refreshes the address balance from blockchain.info) that I made for my own use (Windows only.) I will consider cleaning it up and releasing it. Does Armory allow tracking of Paper Wallets already printed? Yes. It requires tons of RAM and local storage of the blockchain, though. Another option that comes to mind is Electrum - with a little tweak, you can track a public address without importing its private key. Mind explaining to me how I can tweak this up?  Sure: - First, import a dummy address. For instance one that you have generated at bitaddress.org. - Close Electrum and open the wallet file in notepad. - Look for the dummy address and replace it with the address you want to watch. - Save and exit, and launch Electrum again. - Presto! Notes: 1. You can leave the private key of the dummy address unchanged - it won't do any harm. 2. Yeah, it's just a quick and dirty trick, but it works. Hopefully Electrum will implement true watch-only wallets some day. |
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http://blockexplorer.com/Armory And there are a few others, I believe. I also have a little AHK script (which auto-refreshes the address balance from blockchain.info) that I made for my own use (Windows only.) I will consider cleaning it up and releasing it. Does Armory allow tracking of Paper Wallets already printed? Yes. It requires tons of RAM and local storage of the blockchain, though. Another option that comes to mind is Electrum - with a little tweak, you can track a public address without importing its private key. |
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http://blockexplorer.com/Armory And there are a few others, I believe. I also have a little AHK script (which auto-refreshes the address balance from blockchain.info) that I made for my own use (Windows only.) I will consider cleaning it up and releasing it.
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This 30-line Python script will do the hard work for you, and even give you easy-to-remember mnemonics! It even works on my Android phone (after getting Qpython from the Play Store.) You still need the dice, though  https://bitcointalk.org/index.php?topic=308972.0example: 07/11/2013 15:29:32.27> nb_create 35412 13263 66533 45163 13165 41255 62216
18FmQmp5EezkXUv22ZY2PeCpsdAuN1aGV1 == knobs bands future pens bacon aliens unix
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I haven't seen a "vanity" address. What would an example of that look like?
Look at mine for instance |
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My Neteller account is in EUR. I would like to sell 2 BTC for EUR. Do you accept that?
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Satoshi, nefario, freemoney, vladimir, meni rosenfeld, yochdog ... there are plenty more, but you asked for five and I already gave six. I trust those >99%.
I trust Matthew about 95%, a factor which I took into account when wagering with him. I never trusted pirateat40.
Interesting to go over this thread just 2 months later... |
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Real nice concept - I hope it will be successful. A few things about the info on the homepage, though: All files stored SHA-256 encrypted. "SHA-256 encrypted" doesn't mean anything - SHA is for hashing, not encryption. Please clarify. Each download extend the expirity with 30 days. Bad English - A slightly better way would be "Each download extends the availability of the file for another 30 days." |
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I couldn't find a way to put it at the beginning
Using regex
[Xx][Ii][Aa][Nn][Oo]
How about: ^1[Xx][Ii][Aa][Nn][Oo] Sadly the program appears to ignore ^ I had tried: ^[Xx][Ii][Aa][Nn][Oo] and I've just tried your suggestion (shortened to ^1[Xx][Ii]) and it output: 1LztLGfb5dWntB 1XinGyET94coN4Zds3Fx Indeed ^1[Xx][Ii] doesn't do what you want in vanitygen. I once found a way to look for regexes at the beginning of an address (after much experimenting and delving into the source code) but I can't remember what the trick was for the hell of me...  I may take another look at it if you're really interested. |
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JeTJL, b!z: sent 700 satoshis to each |
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 Thanks for doing this, man (P.S. I understand if I haven't been registered long enough - still great software). OS X 10.8 15VT34QtVJAQy48ATfEvNs5mzX4ndHaDR1 I'm in a good mood! Just sent 700 satoshis to you. |
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