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Large Key Sizes and the Security of Password-Based Cryptography

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  • Kent D. Boklan

    (Queens College, USA)

Abstract

We expose a potential vulnerability in the common use of password-based cryptography. When employing a user-chosen password to generate cryptographic keys which themselves are larger than the digest size of the underlying hash function, a part of the resulting key is produced deterministically and this, in turn, may lead to an exploitable weakness.

Suggested Citation

  • Kent D. Boklan, 2009. "Large Key Sizes and the Security of Password-Based Cryptography," International Journal of Information Security and Privacy (IJISP), IGI Global, vol. 3(1), pages 65-72, January.
    • Handle: RePEc:igg:jisp00:v:3:y:2009:i:1:p:65-72
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