[cryptography] no-keyring public

William Yager will.yager at gmail.com
Sat Aug 24 12:53:50 EDT 2013


On Aug 24, 2013, at 11:30 AM, Krisztián Pintér <pinterkr at gmail.com> wrote:

> we can do that. how about this? stretch the password with some KDF, derive a seed to a PRNG, and use the PRNG to create the the key pair. if the algorithm is fixed, it will end up with the same keypair every time. voila, no-keyring password-only public key cryptography.
> 
> do you see any downsides to that, besides the obvious ones that follow from the no-keyring requirement? (slow, weak password.)

You mean like a Bitcoin brain wallet? 

And yes, the downside is that they're very susceptible to brute force attacks. I suppose this is more the case with Bitcoin wallets than with other signature schemes.

Will

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