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Lecture notes in computer science

Efficient and Short Identity-Based Deniable Authenticated Encryption

Chunhua Jin, Jianyang Zhao

Published Jan 1, 2017• 7 citations
Publisher
DOI
10.1007/978-3-319-68542-7_20

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Deniable authentication protocol allows a sender to deny his/her involvement after the protocol run and a receiver can identify the true source of a given message.Meanwhile, the receiver has no ability to convince any third party of the fact that the message was sent by the specific sender.However, most of the proposed protocols didn't achieve confidentiality of the transmitted message.But, in some special application scenarios such as e-mail system, electronic voting and Internet negotiations, not only the property of deniable authentication but also message confidentiality are needed.To settle this problem, in this paper, we present a non-interactive identity-based deniable authenticated encryption (IBDAE) scheme using pairings.We give the security model and formal proof of the presented IBDAE scheme in the random oracle model under bilinear Diffie-Hellman (BDH) assumption.
The notion of deniable authentication protocol was introduced in 1998 by Dwork et al. [11] and Aumann and Rabin [1, 2] independently. As a new cryptographic authentication protocol, a deniable authentication protocol enables an intended receiver to identify the source of a given message without being able to prove the identity of the sender to a third party. Over the past years, many deniable authentication protocols have been proposed. In this paper, we would like to present a universal encrypted deniable authentication protocol from any public key encryption scheme. Provided that the public key encryption scheme is secure, a secure deniable authentication protocol can be directly derived.