Talk:Zero-knowledge password proof

I deleted the old page and simply put in a link to password-based authentication. I am a cryptographer and have never seen the terminology "zero-knowledge password proof" in the technical literature, nor is it clear to me how it would be any different from what is already achieved by password-based key-exchange protocols.

This article does not tell what I would like to know: how exactly it is possible to be sure I know the password without knowing the password. Yecril 19:59, 28 July 2007 (UTC)[reply]

To authenticate yourself to at least one of the banks in the UK, you are asked to provide a certain letter from your password (ie, the first, or the seventh or both). In that case, the password is never revealed, but the callcenter worker can verify that the letters are correct.Dutchdavey 12:18, 3 September 2007 (UTC)[reply]

HSBC use this authentication method (ie, the first digit, and third and last) BUT is this really ZKPP? It doesn't seem like it to me because you have gained some knowledge of the password. After a few iterations you would have the entire password. If it isn't then is there a real world example that is equivalent to the people walking into the caves and coming out of path A or B thing? —Preceding unsigned comment added by 81.105.68.11 (talk) 08:41, 11 November 2007 (UTC)[reply]