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Large Key Sizes and the Security of Password-Based Cryptography

Large Key Sizes and the Security of Password-Based Cryptography

Kent D. Boklan
Copyright: © 2009 |Volume: 3 |Issue: 1 |Pages: 8
ISSN: 1930-1650|EISSN: 1930-1669|ISSN: 1930-1650|EISBN13: 9781615203239|EISSN: 1930-1669|DOI: 10.4018/jisp.2009010105
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MLA

Boklan, Kent D. "Large Key Sizes and the Security of Password-Based Cryptography." IJISP vol.3, no.1 2009: pp.65-72. http://doi.org/10.4018/jisp.2009010105

APA

Boklan, K. D. (2009). Large Key Sizes and the Security of Password-Based Cryptography. International Journal of Information Security and Privacy (IJISP), 3(1), 65-72. http://doi.org/10.4018/jisp.2009010105

Chicago

Boklan, Kent D. "Large Key Sizes and the Security of Password-Based Cryptography," International Journal of Information Security and Privacy (IJISP) 3, no.1: 65-72. http://doi.org/10.4018/jisp.2009010105

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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.

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