On 06/02/07, Peter <[EMAIL PROTECTED]> wrote:
1. There are no irreversible single-factor functions. There are functions that are difficult to reverse now but may not be tomorrow. This is already proven for MD5 and SHA-1.
If by that you refer to examples of being able to find two or more different messages with the same MD5 or SHA-1 digest then you are right, but it's still impossible to take a SHA-1 digest of limited number of bits and reverse it to the original message, fortunately. --Amos
