Questions tagged [srp]

The “secure remote password protocol” is a modern cryptographic protocol for password authenticated key exchange (PAKE). It provides some desireable properties, like a passive eavesdropper being unable to brute-force the password. It is usually used to derive shared session keys from passwords and authenticate users with passwords.

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4 votes
2 answers

Can the premaster secret generated by SRP be used as a secure private key?

It seems like the pre-master secret generated during the SRP protocol would make a good source to generate a shared private key using a secure hash to compress it down into a 128/256 symmetric key. ...
Grant BlahaErath's user avatar
10 votes
1 answer

How realistic is a dictionary attack on a secure remote password protocol (SRP) verifier?

I'm deploying a secure remote password protocol implementation and I'm wondering what the consequences are when the client generated verifier gets leaked to an attacker. I've read Thomas Wu's paper ...
Grant BlahaErath's user avatar
13 votes
3 answers

What should be the size of a Diffie-Hellman private key?

I'm implementing the SRP-6 protocol, which relies on discrete logarithms for it's security (essentially Diffie-Hellman). The RFC documents state: The private values $a$ and $b$ SHOULD be at least 256-...
Jim's user avatar
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