No abstract

A symmetric group key agreement protocol enables the group members to derive a shared session key for secure communication among them, whereas an asymmetric one facilitates security to any communication from outside, without adding outsiders into the group. In order to combine both the functionalities, a hybrid key agreement protocol is needed, which can output a shared symmetric key for inside communication and an asymmetric key pair for any unrestricted sender. The application mentioned in this paper pushes the need of secure on-chip communication for intersecure and intrasecure zones simultaneously. In particular, we look forward for a solution to ensure communication security among multiple processing clusters actively running on an integrated circuit.The proposed protocol offers a lightweight symmetric encryption for intrazone communication and a public key encryption for interzone communication taking most advanced security issues into account.An extended abstract of this contribution has already been published 1 at Privacy, Security & Trust (PST) 2018.

No abstract

No abstract

No abstract

No abstract

No abstract

In many privacy-preserving protocols, protection of the user's identity, called anonymity, is a desirable feature. Another issue is that, if a signed document is leaked then anyone can be convinced of the authenticated data, which is strictly not allowed for sensitive data, instead the authentication only by a designated receiver is recommended. There are many scenarios in real life, for example e-auction, where both the functionalities-anonymity and designated verification are required simultaneously. For such an objective, in this paper we introduce a compact scheme of identity-based strong designated verifier group signature (ID-SDVGS) by combining the good features of strong designated verifier signature and group signature in ID-based setting. This scheme provides anonymity to the signer of a designated verifier signature with the feature of the revocation of signer's identity in case of misuse or dispute. Moreover, our scheme fulfils all the security properties of the individual components. We have obtained an ID-based instantiation of the generic group signature given by Bellare et al. in Eurocrypt 2003, and have proposed our scheme on that framework. To the best of our knowledge, this is the first construction of ID-SDVGS.