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Paper 2003/011

Cryptanalysis of Lee-Hwang-Li's Key Authentication Scheme

Fangguo Zhang and Kwangjo Kim

Abstract

Key authentication is very important in secret communications and data security. Recently, Lee, Hwang and Li proposed a new public key authentication scheme for cryptosystems with a trusty server. However, in this paper, we will show that Lee-Hwang-Li's key authentication scheme is not secure, from the obtained public information, any one can get the private key of the user. And then, we propose an improved scheme. We conclude that our new key authentication scheme not only resolves the problems appeared but also is secure.

Metadata
Available format(s)
PDF PS
Publication info
Published elsewhere. Unknown where it was published
Keywords
Key authentication schemeCryptanalysisCertificatePassword.
Contact author(s)
zhfg @ icu ac kr
History
2003-03-12: revised
2003-01-22: received
See all versions
Short URL
https://ia.cr/2003/011
License
Creative Commons Attribution
CC BY
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