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Title:
Comments: Insider attack on Cheng et al.'s pairing-based tripartite key agreement protocols
Authors: Hung-Yu Chien
Abstract:Recently, Cheng et al. proposed two tripartite key agreement protocols from pairings: one is certificate-based and the other is identity-based (ID-based). In this article, we show that the two schemes are vulnerable to the insider impersonation attack and the ID-based scheme even discloses the entities¡¦ private keys. Solutions to this problem are discussed.
ePrint: https://eprint.iacr.org/2005/013
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