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A rainbow table is a large, precomputed table designed to cache the output of cryptographic hash functions to decrypt hashed passwords into plaintext. Rainbow tables were invented by IT expert ...

In many network communications it is crucial to be able to authenticate both the contents and the origin of a message. Digital signatures based on public key schemas are used for such authentication.

For more than six years, the SHA1 cryptographic hash function underpinning Internet security has been at death's door. Now it's officially dead, thanks to the submission of the first known instance of ...