Re: Searching for a special challenge&response algorithm

David Wagner schrieb:

> Jan Peter Stotz wrote:
>>When a client connects to a server it has to authenticate itself against
>>the server. For preventing brute force attacks against this authentication
>>(systematic testing) with one client the server creates a challenge which
>>has to be solved by the client. For solving the challenge the client needs
>>a bit of CPU power which results in a delay of about a second. The server
>>only allows an authentication by the client after successfully solving the
>>challenge.
>
> You'll find a lot of work on the literature on this subject.
> Some key words to aid you in your literature search: "client puzzles",
> "hashcash", "proofs of work".

Thank you David, these are the keywords I were searching for.

Jan
Received on Mon May 1 02:06:18 2006