Ronald Linn Rivest (;
born May 6, 1947) is an American cryptographer and computer scientist whose work has spanned the fields of algorithms and combinatorics, cryptography, machine learning, and election integrity.
He is an Institute Professor at the Massachusetts Institute of Technology (MIT),
and a member of MIT's Department of Electrical Engineering and Computer Science and its Computer Science and Artificial Intelligence Laboratory.
Along with Adi Shamir and Len Adleman, Rivest is one of the inventors of the RSA algorithm, for which they won the 2002 ACM Turing Award.
He is also the inventor of the symmetric key encryption algorithms RC2, RC4, and RC5, and co-inventor of RC6. He also devised the MD2, MD4, MD5 and MD6 cryptographic hash functions.
HistoryLayer draws the world as it was in any year from 123,000 BCE to
2026. Move the slider and the borders redraw for that year; the map
carries 23,890 events, 12,790 people, 837 wars and 13,183 cities, each
one readable in place. Signing in is optional and lets you keep what
you find.