Adi Shamir (Hebrew: עדי שמיר; born July 6, 1952) is an Israeli cryptographer and inventor.

He is a co-inventor of the Rivest–Shamir–Adleman (RSA) algorithm (along with Ron Rivest and Len Adleman), a co-inventor of the Feige–Fiat–Shamir identification scheme (along with Uriel Feige and Amos Fiat), one of the inventors of differential cryptanalysis and has made numerous contributions to the fields of cryptography and computer science.

Together with Eli Biham, he discovered differential cryptanalysis in the late 1980s, a general method for attacking block ciphers.

[6] Shamir has also made contributions to computer science outside of cryptography, such as finding the first linear time algorithm for 2-satisfiability[7] and showing the equivalence of the complexity classes PSPACE and IP.

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