digital signatures ==>
<cryptography> Extra data appended to a message which identifies and
authenticates the sender and message data using public-key encryption.
The sender uses a one-way hash function to generate a hash-code of about 32 bits
from the message data. He then encrypts the hash-code with his private key. The
receiver recomputes the hash-code from the data and decrypts the received hash
with the sender's public key. If the two hash-codes are equal, the receiver can
be sure that data has not been corrupted and that it came from the given sender.
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Signature Standard » Digital Simulation Language