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Encrypted key exchange: password-based protocols secure against dictionary attacks

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2 Author(s)
Bellovin, S.M. ; AT&T Bell Lab., Murray Hill, NJ, USA ; Merritt, Michael

Classic cryptographic protocols based on user-chosen keys allow an attacker to mount password-guessing attacks. A combination of asymmetric (public-key) and symmetric (secret-key) cryptography that allow two parties sharing a common password to exchange confidential and authenticated information over an insecure network is introduced. In particular, a protocol relying on the counter-intuitive motion of using a secret key to encrypt a public key is presented. Such protocols are secure against active attacks, and have the property that the password is protected against offline dictionary attacks

Published in:

Research in Security and Privacy, 1992. Proceedings., 1992 IEEE Computer Society Symposium on

Date of Conference:

4-6 May 1992