Blind signatures with DSA/ECDSA?

2004-04-28 Thread An Metet
Here is the blind DSA signature based on MacKenzie and Reiter, http://www.ece.cmu.edu/~reiter/papers/2001/CRYPTO.pdf, in graphical form. Recall that a DSA public key is p, q, g, y; private key x; signature on hash h is: Choose k < q r = g^k mod p mod q s = rx/k + h/k mod q Output (r,s) Here is th

Re: Blind signatures with DSA/ECDSA?

2004-04-24 Thread privacy.at Anonymous Remailer
Often people ask about blind DSA signatures. There are many known variants on DSA signatures which allow for blinding, but blinding "plain" DSA signatures is not discussed much. Clearly, blinding DSA signatures is possible, through general purpose two party multi-party computations, such as circ

Blind signatures with DSA/ECDSA?

2004-04-07 Thread Eric Rescorla
Folks, Does anyone know if there is a blind signature scheme that works with DSA or ECDSA? I know about Camenisch, Pivetau and Stadler's "Blind Signatures Based on the Discrete Logarithm Problem" (1994), but as far as I can tell that doesn't produce straight DSA-verifiable signatures and so is a l