ID based signcryption scheme in standard model
ProvSec'12 Proceedings of the 6th international conference on Provable Security
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Signcryption is an important cryptography primitive that provides confidentiality and authenticity for the messages simultaneously, at lower costs than traditional sign-then-encrypt method. This paper presents the attacks against two identity-based signcryption schemes: the Zhang et al.’s assertion signcryption scheme in decentralized autonomous environments, which is not consistent in multi-PKG scenarios, and the Yu et al.’s identity-based signcryption scheme in the standard model, which cannot achieve indistinguishability against chosen plaintext attacks.