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Improvement of Saeednia's self-certified key exchange protocols

Improvement of Saeednia's self-certified key exchange protocols

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© IEE
Published

In 1997, two self-certified key exchange protocols were proposed by Saeednia. It is shown that Saeednia's self-certified key exchange protocols are insecure in that an adversary may impersonate any legitimate user in key exchange. An improvement against the impersonation attack is described.

Inspec keywords: public key cryptography; protocols

Other keywords: impersonation attack; self-certified key exchange protocols

Subjects: Codes; Protocols; Data security; Protocols

References

    1. 1)
      • Brickell, E.F., McCurley, K.S.: `An interactive identification schemebased on discrete logarithms and factoring', Advances in Cryptology - Eurocrypt'90, 1990, Springer-Verlag, p. 63–71.
    2. 2)
      • R.L. Rivest , A. Shamir , L. Adleman . A method for obtaining digital signatures and public key cryptosystems. Commun. ACM , 2 , 120 - 126
    3. 3)
      • W. Diffie , M.E. Hellman . New directions in cryptography. IEEETrans. Inf. Theory , 6 , 135 - 145
    4. 4)
      • Saeednia, S.: `Identity-based and self-certified key-exchange protocols', Proc. Information Security and Privacy Second Australasian Conf., 7–9 June 1997, Sydney, Australia, p. 303–313.
    5. 5)
      • Girault, M.: `Self-certified public keys', Advances in Cryptology - Eurocrypt'91, 1991, Springer-Verlag, p. 491–497.
    6. 6)
      • Girault, M.: `An identity-based identification scheme based on discretelogarithms modulo a composite number', Advances in Cryptology - Eurocrypt '90, 1990, Springer-Verlag, p. 481–486.
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