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Author Topic: [WTS] BIP38 cold-storage wooden cards to protect your bitcoin - 10% off  (Read 9017 times)
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June 06, 2014, 12:46:20 PM
 #21

These look amazing. I promised myself to stop buying Bitcoin related items, but man... I am really tempted to get me one of these.

I see that you offer "Armory multi-fragment backups", would it be possible to do something like that for Electrum? Like, encrypt the seed with BIP38 and put it onto a piece of wood? Or is that something BIP38 doesn't support? I haven't taken the time to read up on it yet, so I apologize if this is a stupid question. Anyway I would love to have something like that as a backup. Grin


Don't refrain your instinct, this one is not just a gadget. I mean, its a gadget but a) is awesome b)is useful Wink ehehe.

We could do an electrum experiment :

one side would contain your public master key and your public key
the other would contain your seed.


We can find a way to encrypt your seed before sending it to me. I'm afraid it can't be BIP38... Let me know if you want me to go ahead... Also, I don't have much free time to play with this so it would be awesome of you if you can find someone else who wants this Wink




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June 06, 2014, 01:17:53 PM
 #22

Don't refrain your instinct, this one is not just a gadget. I mean, its a gadget but a) is awesome b)is useful Wink ehehe.

We could do an electrum experiment :

one side would contain your public master key and your public key
the other would contain your seed.

We can find a way to encrypt your seed before sending it to me. I'm afraid it can't be BIP38... Let me know if you want me to go ahead... Also, I don't have much free time to play with this so it would be awesome of you if you can find someone else who wants this Wink
Well, I am very very tempted but I have spend so much lately, hahaha. The Electrum thing would be amazing and I would love to have that. If we could do it, I would gladly buy one. What do you mean with finding someone else who wants it? Do you need more than one person to do this idea?

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June 06, 2014, 11:27:42 PM
 #23

These look very nice.

Any chance of making some in different wood finishes/stains? Smiley

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June 07, 2014, 08:30:24 AM
 #24

What do you mean with finding someone else who wants it? Do you need more than one person to do this idea?

Of course it doesn't make much business sense to just make one Wink.  But whatever, I want to try  Smiley Lets move the conversation over email : info@woodwallets.io


Any chance of making some in different wood finishes/stains? Smiley

Hi, thank you!  How do you see them differently with wood finishing stains? We can think about it

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June 07, 2014, 04:28:56 PM
 #25

I would be interested in the electrum thing!
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June 07, 2014, 04:46:31 PM
 #26

I would be interested in the electrum thing!
Yeah! Two customers that want it! I have received an email from woodwallets.io, by the way. They are trying to find a good way to encrypt the seed. I have suggested them to look into GPG or SHA512.

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June 07, 2014, 07:10:19 PM
 #27

Any chance of making some in different wood finishes/stains? Smiley

Hi, thank you!  How do you see them differently with wood finishing stains? We can think about it

Maybe a cherry or a mahogany color? But not sure how that would affect the QR code or readability...

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June 07, 2014, 07:50:07 PM
 #28

I would be interested in the electrum thing!
Yeah! Two customers that want it! I have received an email from woodwallets.io, by the way. They are trying to find a good way to encrypt the seed. I have suggested them to look into GPG or SHA512.
If you can please keep me updated!
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June 07, 2014, 08:05:39 PM
 #29

Any chance of making some in different wood finishes/stains? Smiley

Hi, thank you!  How do you see them differently with wood finishing stains? We can think about it

Maybe a cherry or a mahogany color? But not sure how that would affect the QR code or readability...

If we want to alter the color the important thing is that we keep the surface of a light color to keep contrast strong with the dark engraving.  Any ideas?

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June 07, 2014, 08:07:04 PM
 #30

I would be interested in the electrum thing!
Yeah! Two customers that want it! I have received an email from woodwallets.io, by the way. They are trying to find a good way to encrypt the seed. I have suggested them to look into GPG or SHA512.
If you can please keep me updated!

It might take a week but we'll find a way to make it beautiful

Bitmessage : BM-NAx31aEiqeq5zKUtxhKscXQ7Dwn1jJfR
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June 07, 2014, 09:06:27 PM
 #31

It might take a week but we'll find a way to make it beautiful
I can't wait! Could you please keep me posted? Thank you so much for all the effort that you will be putting into this.
By the way, could you give me an estimate of the price? Always handy to know. Tongue

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June 07, 2014, 10:28:38 PM
 #32

No problem.  Don't worry it can't be more expensive than traditional bip38 wallets (25$)

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June 08, 2014, 01:19:59 AM
 #33

I'm really excited to get mine! I have a feeling it's on it's way (;

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June 09, 2014, 10:19:59 AM
 #34

It might take a week but we'll find a way to make it beautiful
I can't wait! Could you please keep me posted? Thank you so much for all the effort that you will be putting into this.
By the way, could you give me an estimate of the price? Always handy to know. Tongue

As I type Sam is playing with BIP0038 and manage to bend it to his will : we are now able to encrypt Electrum seed into beatiful strings that looks like private keys.   We are testing it now. Get ready for it Wink


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June 09, 2014, 10:23:07 AM
 #35

It might take a week but we'll find a way to make it beautiful
I can't wait! Could you please keep me posted? Thank you so much for all the effort that you will be putting into this.
By the way, could you give me an estimate of the price? Always handy to know. Tongue

As I type Sam is playing with BIP0038 and manage to bend it to his will : we are now able to encrypt Electrum seed into beatiful strings that looks like private keys. We are testing it now. Get ready for it Wink
I can't wait man! I am really looking forward to the design and everything you guys come up with!

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June 09, 2014, 11:19:38 AM
 #36

Bippy is updated, tested, and works with electrum seeds. The UI needs refinement for sure after this new introduction, but now it does what it is supposed to. We'll fix it along the way.

Step 1:

Install Kivy (required for the UI), clone and run from github :

Code:
git clone git@github.com:inuitwallet/bippy.git
Disconnect from the internet and make sure you are using a clean machine (better a Live DVD) and execute the tool
Code:
cd bippy
kivy bippy.py


To encrypt your electrum seed :
  • Type your seed into the "private key" field. Observe how Bippy detects that a seed has been entered
  • Choose a passphrase
  • Press "Encrypt"

It will generate a nice encrypted key that start with "SeedE" , something like SeedER4sSM6VLmmDB6Ftu3wNSt483iXw17bJxu3nvQ6qTNsrx2bo7Nnw4zdD

Now you can use that very same code to place an order on http://woodwallets.io . Feel free to get private only side or public+private.
This afternoon I will play with electrum logo instead of the "BTC" logo on wood Wink.


To decrypt your encrypted electrum seed :

  • Type the encrypted seed into the "private key" field.
  • Enter your encryption a passphrase
  • Press "Decrypt"


here a preview !


For technical details, wait for Sam Wink

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June 09, 2014, 11:22:19 AM
 #37

I will look into the implementation later on today to make sure that my seed and the encrypted private address really are safe. I trust you guys, but not enough to give you my whole wallet without double checking the code. No offence.

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June 09, 2014, 11:27:26 AM
 #38

This is exactly the answer I wanted to read Wink

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June 09, 2014, 11:39:51 AM
 #39

Hi Everyone.

I'm Sam, the developer of Bippy. I'm happy to answer any question about the code or implementations of encryption that anyone may have

I've added the ability to encrypt Electrum Mnemonic seeds using a customised encryption method based on BIP0038. Bippy will recognise an Electrum seed based on the fact that it is twelve separate words. You add a password and the encryption takes place. Bippy can also decrypt the encrypted string back to the 12 word seed but only with the correct passphrase.

The code is available on github here:
http://github.com/inuitwallet/bippy
The Electrum specific code is in this file:
https://github.com/inuitwallet/bippy/blob/master/encrypt/electrum.py

As Nico has said, we are adding functionality to bippy as requests come in so the UI is in need of a bit of work.
I'll be working on making it easier to use over the next few days as well as attempting to get some compiled binaries up and working too.

If you have any questions or suggestions feel free to get in contact or post here.

A quick overview of the method for those who are interested (sorry for anyone who isn't interested. I'm quite pleased with this and want to talk about it Wink):
  • Use the Electrum method to convert the mnemonic into the seed number
  • Take a hash of the last 4 digits to act as a checksum
  • Use that hash and the passphrase to generate an encryption key using scrypt
  • Use that key to AES 256 encrypt the original seed in two halves (as in BIP0038)
  • The encrypted string is a Base58_Check encoded concatenation of some magic bytes (to make the start of the string 'SeedE'), the checksum hash and the two encrypted halves
The decryption is the reverse of this but using the various checksums to ensure that the string is correct and the password works. 
AussieHash
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June 09, 2014, 01:58:06 PM
 #40

Cross post
http://www.reddit.com/r/Bitcoin/comments/27ot5c/before_writing_down_the_electrum_seed_anywhere/ci2wozo
Quote
Whilst I believe Bippy is open source there is no reason at all to trust a third party.
Electrum already AES encrypts your seed (if you password protect it) and stores it in the the wallet file.
https://electrum.org/faq.html#wallet-file
In my case the encrypted seed is an 88 character string.
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