A deniable authentication scheme using RSA is described and proven secure in the random oracle model. A countermeasure to a well-known attack on efficient deniable authentication to multiple recipients is described and proven secure.

In this paper, we propose a new primitive called non interactive deniable ring authentication: it is possible to convince a verifier that a member of an ad hoc collection of participants is authenticating a message m without revealing which one and the verifier V cannot convince any third party that the message m was indeed authenticated in a non-interactive way. Unlike the deniable ring authen...

Deniable authentication is a new cryptographic technique of authentication, by which it allows the sender to prove his legitimacy to the intended receiver, but the intended receiver cannot prove to the third party the identity of the sender. Meanwhile, in order to meet various circumstances of the resource limit mobile devices, Lu and Cao proposed a non-interactive deniable authentication proto...

A deniable authentication protocol enables a receiver to identify the true source of a given message but not to prove the identity of the sender to the third party. Non-interactive protocol is more efficient than interactive protocol in terms of communication overhead, and thus several non-interactive deniable authentication protocols have been proposed. So, it is very necessary to design a den...

E-mail brings us lots of conveniences. Especially with help of PGP and S/MIME, it gives both confidentiality and message/origin authentication. However, in some cases for strong privacy, a message sender will not want to let others know even the fact that he sent a message to a recipient. Very recently, Harn and Ren proposed a fully deniable authentication scheme for E-mail where a sender can r...

Deniable authenticated protocol is a new cryptographic authentication protocol that enables a designated receiver to identify the source of a given message without being able to prove the identity of the sender to a third party. Therefore, it can be applied to some particular situations in electronic commerce. In this paper, we formally define the security model for the non-interactive ID-based...

the standard model Bin Wang ,Qing Zhao and Ke Dai Information Engineering College of Yangzhou University No.196 West HuaYang Road, Yangzhou City, Jiangsu Province, P.R.China E-mail: [email protected] Abstract: Deniable authentication protocols enable a sender to authenticate a message to a receiver such that the receiver is unable to prove the identity of the sender to a third party. In contrast...

A new approach and an idea for exploration are presented to the concurrent deniable authentication based on witness-indistinguishable (WI) within the framework of universally composable (UC) security. A definition of an ideal functionality for deniable authentication is formulated. A new deniable authentication protocol is proposed based on two primitives of the verifiably smooth projective Has...

In order to prevent the malicious attack, two new ID-based deniable authentication protocols based on pairings are proposed by Chou et al. and Cao et al., respectively. Both of them proposes some lemmas to prove their scheme can not only attain the desired deniable property but also can prevent malicious attacks. However, the security of these two ID-based deniable authentication protocols are ...