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What is RSA?

RSA is an asymmetric cipher defined in U.S. Patent 4,405,829 in 1977, the same year that IBM's algorithm was selected as the Data Encryption Standard.

The RSA patent expired on 20 September, 2000.

The RSA algorithm is named after it's three creators: Ron Rivest, Adi Shamir, and Leonard Adleman.

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