A practical efficient receiver deniable encryption scheme based on BCP commitment scheme and idea of Klonowski et al. is proposed in the paper. The analysis of the proposed schemes is also presented.

A designated verifier signature is a special type of digital signature, which convinces a designated verifier that she has signed a message in such a way that the designated verifier cannot transfer the signature to a third party. A strong designated verifier signature scheme enhances the privacy of the signer such that no one but the designated verifier can verify the signer’s signatures. In t...

as a response to a growing interest in rfid systems such as internet of things technology along with satisfying the security of these networks, proposing secure authentication protocols are indispensable part of the system design. hence, authentication protocols to increase security and privacy in rfid applications have gained much attention in the literature. in this study, security and privac...

We present the design and prototype implementation of a new public key infrastucture for email authentication. Our approach applies recent developments in identity-based cryptography and observations concerning the role of DNS and email servers in the current email architecture to produce end-to-end email signatures with no infrastructure change or new security assumption. Like current email si...

Deniable encryption, introduced in 1997 by Canetti, Dwork, Naor, and Ostrovsky, guarantees that the sender or the receiver of a secret message is able to “fake” the message encrypted in a specific ciphertext in the presence of a coercing adversary, without the adversary detecting that he was not given the real message. To date, constructions are only known either for weakened variants with sepa...

A method for stream deniable encryption of secret message is proposed, which is computationally indistinguishable from the probabilistic encryption of some fake message. The method uses generation of two key streams with some secure block cipher. One of the key streams is generated depending on the secret key and the other one is generated depending on the fake key. The key streams are mixed wi...

The widespread use of wireless cellular networks has made security an ever increasing concern. GSM is the most popular wireless cellular standard, but security is an issue. The most critical weakness in the GSM protocol is the use of one-way entity authentication, i.e., only the mobile station is authenticated by the network. This creates many security problems including vulnerability against m...

In order to provide different services for the customers, banks embark on a multimedia contact center. Considering that, in this center, where several services such as transferring money, getting statement information and asking for check books are provided, the authentication is of high importance. How to allocate the appropriate authentication method for each customer is one of the challe...