[ANN] bitaddress.org Safe JavaScript Bitcoin address/private key

[BG4]

I would like to say Thank you for this GOLD Standard for Cold storage Paper wallets. ....I would just like to take this time and add my experiences that I have been working with....In the last few week I have upgraded my cell phone to a Samsung Galaxy Note 3...Little did I know ..It has NFC ( near Field Comminication) with Special Programmable Tags...Also The nexus 7 2013 does this also but not as many tags are compatable...There are other threads on the NFC uses with bitcoin on the forum if you look....This week , Staples has a Hot laminator On sale for $29.00 with 5 mill. pocket note card Laminating stock that the Paper wallet fits in nicely..This makes the Paper wallet almost indestructible.....Now comes the NFC tag...I added a NFC tag into the Wallet near the Load QR on the reverse side....This NFC tag when scanned loads the Blockchain.info site for that bitcoin address for easy checking for Coins Stats.....Because the Wallet is hot laminated The Halogram stickers aren't needed because you would need to cut the wallet with sissors to access the Redeem code... The NFC tag is Laminated with in the paper wallet....Just lay Nexus 7 or Samsung Note 3 on to of the paper wallet instantly shows Wallet amount......I also added a Numbered Holagram sticker just the give a serial number for reference and would like to somehow add that into the blockchain as an extra security step...

I would like to make one request....Denominations on the paper wallet..(0.1)(0.01)(0.001)bitcoins Maybe with differant colors.....Or Happy Birthday Wallets....( I like the Christmas Wallet idea)
Maybe  Have a field on the Front that  Users can add  Notes for that Wallet, So a message to someone or the Denomination amount can be added
 
*<ADD>These wallets that I am making are for LONG term storage....I am trying to fine out how long the Programmable NFC holds it memory

[Newar]

[...] easy checking for Coins Stats.....[...]

I just use the Bitcoin Balance app
http://alarmred.com/bitcoinbalance

[minimalB]

Small display bug (using Safari or Firefox):

1.
At "Paper Wallet" tab, create 2 or more addresses using "Hide Art?" check-box (so no artwork is used). After addresses are generated, if you click again on check-box "Hide Art?" or "BIP38 Encrypt?", private keys start jumping around.

2.
If you do the same as 1., but you also use BIP38 option, after addresses are generated, if you click on "BIP38 Encrypt?" check-box, font size changes.

I tried with Safari and Firefox, can someone test with Chrome?

[jodyrb]

Could anyone program a bitcoin address generator for an hp 50g calculator?

[pointbiz]

Shamir's secret sharing is coming next:
https://github.com/pointbiz/bitaddress.org/commit/7e760cb0c61b3f4218e41a239021f839f5fb8b93
https://github.com/pointbiz/bitaddress.org/pull/57
Thanks to Jeff Weiss for the commits.


Example use case 2 of 3:
Division of 3 shares:
1 share in a safety deposit box ("Box")
1 share at Home
1 share at Work
Threshold of 2 can be redeemed in these permutations
Home + Box
Work + Box
Home + Work

Example use case 7 of 13:
Division of 13 shares:
4 shares in a safety deposit box ("Box")
3 shares with good friend Angie
3 shares with good friend Fred
3 shares with Self at home or office
Threshold of 7 can be redeemed in these permutations
Self + Box (no trust to spend your coins but your friends are backing up your shares)
Angie + Box (Angie will send btc to executor of your will)
Fred + Box (if Angie hasn't already then Fred will send btc to executor of your will)
Angie + Fred + Self (bank fire/theft then you with both your friends can spend the coins)

[Financisto]

Shamir's secret will be an excelent upgrade to this (already) good tool!

Keep up the good work!

Cheers!

[pointbiz]

v2.9.0
https://www.bitaddress.org/bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html
https://www.bitaddress.org/bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html.sig
Split Wallet: Shamir's Secret Sharing for a Bitcoin private key.
Thanks to Jeff Weiss.

[minimalB]

Thank you pointbiz for all your exceptional work!

Split wallet is excellent addition. Also, new menu design looks great.

Thanks!

[danieldean]

Hi

Many thanks for your hard work. I used bitaddress.org a few weeks ago to create my first ever paper wallet. I was holding a bit too much BTC unsafely until then. 

When I created my paper wallet, which I printed a couple of copies of, I messed up when attempting to laminate them and they both ended up getting chewed. Fortunately I could still scan the QR Codes so I didn't lose my BTC.

The problem I then had was that I didn't want to start from scratch but I still wanted a nice, and laminated, paper wallet. I tried using GIMP to do a recreation but the text was way too blurry when rotated and it was generally below par. I ended up using HTML and CSS to recreate my paper wallets and I'm glad to say it was successful. In doing this I ended up creating a utility that can do all this for me. It includes your background but nothing else. It doesn't recreate the QR Codes either, you have to use your 'Wallet Details' to do that. I think some others may find it useful if they mess up like me, is it okay to distribute it and if so how do I attribute your background to you?

If it's not okay or if you don't mind doing so could you please include the ability to recreate paper wallets from a given private key in bitaddress.org?

[cypherdoc]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

2014-04-15: status ACTIVE
bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html
 - Split Wallet: Shamir's Secret Sharing for a Bitcoin private key.
   Thanks to Jeff Weiss.

[dooglus]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html

Probably because your web browser mangled the file. Try using curl or wget to download it.

[pointbiz]

v2.9.1
https://www.bitaddress.org/bitaddress.org-v2.9.1-SHA1-67b1facd70890aa9544597e97122c7a1d4fdc821.html
 - Hungarian translation. Thanks bitcoin333.
 - Auto detect culture and translate. Thanks onovy.

[cypherdoc]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html

Probably because your web browser mangled the file. Try using curl or wget to download it.

i don't think so.  it's never acted up before.

in fact, now it matches since pointbiz posted the new version above just today

[pointbiz]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html

Probably because your web browser mangled the file. Try using curl or wget to download it.

i don't think so.  it's never acted up before.

in fact, now it matches since pointbiz posted the new version above just today

Not sure what to say but I didn't touch the 2.9.0 file today. I know you didn't make a noob error but others might by not saving the page as HTML only. As always, it's super difficult to ensure the integrity of the path between my authorship of the HTML document and your receipt so confirming the sha1 checksum is the only way to be safe.

[pointbiz]

Hi

Many thanks for your hard work. I used bitaddress.org a few weeks ago to create my first ever paper wallet. I was holding a bit too much BTC unsafely until then. 

When I created my paper wallet, which I printed a couple of copies of, I messed up when attempting to laminate them and they both ended up getting chewed. Fortunately I could still scan the QR Codes so I didn't lose my BTC.

The problem I then had was that I didn't want to start from scratch but I still wanted a nice, and laminated, paper wallet. I tried using GIMP to do a recreation but the text was way too blurry when rotated and it was generally below par. I ended up using HTML and CSS to recreate my paper wallets and I'm glad to say it was successful. In doing this I ended up creating a utility that can do all this for me. It includes your background but nothing else. It doesn't recreate the QR Codes either, you have to use your 'Wallet Details' to do that. I think some others may find it useful if they mess up like me, is it okay to distribute it and if so how do I attribute your background to you?

If it's not okay or if you don't mind doing so could you please include the ability to recreate paper wallets from a given private key in bitaddress.org?

The background image for the art on the paper wallet is public domain it was sourced from a contest run by casascius on this forum. So I believe no attribution is required. Feel free to distribute your tool.

I have received some requests in the past about re-creating a paper wallet with a known key. At this moment I do not have any plans to implement that functionality, I may change my mind in the future.

[pointbiz]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

2014-04-15: status ACTIVE
bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html
 - Split Wallet: Shamir's Secret Sharing for a Bitcoin private key.
   Thanks to Jeff Weiss.

For the sake of paranoia if you still have the file that returned the bad hash can you do a diff and look for anything suspicious?

If you did save the page as "web page complete" by accident there should be obvious signs. Also, if there was something malicious in the file you received it should jump out by doing a diff.

[cypherdoc]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

2014-04-15: status ACTIVE
bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html
 - Split Wallet: Shamir's Secret Sharing for a Bitcoin private key.
   Thanks to Jeff Weiss.

For the sake of paranoia if you still have the file that returned the bad hash can you do a diff and look for anything suspicious?

If you did save the page as "web page complete" by accident there should be obvious signs. Also, if there was something malicious in the file you received it should jump out by doing a diff.

I got the raw code from github and did a Save Page As like I always do. Unfortunately I already deleted that file obviously.

[pointbiz]

why does this:

Code:

cypher@cypher:~/Desktop$ sha1sum bitaddress.org.html 
2d139339eaf0d1884436c316525e2f89d7249d45  bitaddress.org.html

not match this:

2014-04-15: status ACTIVE
bitaddress.org-v2.9.0-SHA1-6e9ae5c64d510b53fa39e36a3017d5342b838984.html
 - Split Wallet: Shamir's Secret Sharing for a Bitcoin private key.
   Thanks to Jeff Weiss.

For the sake of paranoia if you still have the file that returned the bad hash can you do a diff and look for anything suspicious?

If you did save the page as "web page complete" by accident there should be obvious signs. Also, if there was something malicious in the file you received it should jump out by doing a diff.

I got the raw code from github and did a Save Page As like I always do. Unfortunately I already deleted that file obviously.

After the 2.9.0 release I merged in some other commits. You need to save the commit which has v2.9.0 in the commit message/comments. Sometimes github is ahead of the website because I'm working on commits for the next release. So, be sure to double check the commit message for the version number.

[Light]

Sorry if this has been asked before - but is this capable of producing compressed private keys and if so how would one go about it?

[Dabs]

Sorry if this has been asked before - but is this capable of producing compressed private keys and if so how would one go about it?

I just went there, just now.

bitaddress.org

After the mouse and keyboard random input, the easiest way to generate compressed keys is to go to the Bulk Wallet tab, and click on Compressed Addresses, then hit Generate.

Compressed private keys begin with the letters K or L.

Personally, I prefer using vanitygen to create a lot of keys, its much faster than the javascript version.