Moni Naor (Hebrew: מוני נאור) is an Israeli computer scientist, currently a professor at the Weizmann Institute of Science.

He is notable for initiating research on public key systems secure against chosen ciphertext attack and creating non-malleable cryptography, visual cryptography (with Adi Shamir), and suggesting various methods for verifying that users of a computer system are human (leading to the notion of CAPTCHA).

[2] In 1994 he was the first, with Amos Fiat, to formally study the problem of practical broadcast encryption.

[3] Along with Benny Chor, Amos Fiat, and Benny Pinkas, he made a contribution to the development of Traitor tracing, a copyright infringement detection system which works by tracing the source of leaked files rather than by direct copy protection.

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