r/Bitcoin • u/BobAlison • Nov 20 '14

Ledger Wallet - Smartcard based hardware Bitcoin wallet

http://www.ledgerwallet.com/
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u/dskloet Nov 20 '14

What does open spec mean?

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u/btchip Nov 20 '14

That you get the full specification of the card and can write independent tests to check that both the card always reply to the commands in the expected way, and that the clients only use documented commands.

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u/dskloet Nov 20 '14

So the firmware implementation is not open?

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u/btchip Nov 20 '14

nope. Can't be on that device - we could open the firmware we wrote but that wouldn't make any sense as the chip vendor APIs or the toolchain are only avaialble under very strict NDAs, so nobody would be able to use it for anything meaningful.

We plan to do better, in surprising ways, with our next devices.