Anonymous user authentication is an important but challenging task for wireless communications. In a recent paper, Das proposed a smart card-based anonymous user authentication protocol for wireless communications. The scheme can protect user privacy and is believed to be secure against a range of network attacks even if the secret information stored in the smart card is compromised. In this pa...

Being a secret, it’s best protected when it never leaves the safe zone. Proving identity involves communicating the secret to another party, which eventually exposes the whole or a part of the secret, in a direct or indirect (hashed) form. In the real world, authentication traffic passes thousands of systems between a prover (you) and a verifier (an entity which eventually decides whether your ...

As a useful means of safeguarding privacy of communications, deniable authentication has received much attention. A Chameleon-based deniable authenticated key agreement protocol is presented in this paper. The protocol has following properties. Any one of the two participants can’t present a digital proof to convince a third party that a claimed agreement has really taken place. Once a forgery ...

Access control technology is one of the key technologies to ensure safe resource sharing. Identity authentication and authority distribution are two for access restrict unauthorized users from accessing resources, only authorised legal can resources. However, user privacy protection frequent permission changes thorny issues that need be solved urgently by technology. In this paper, a dynamic mo...

Many security protocols have the aim of authenticating one agent acting as initiator to another agent acting as responder and vice versa. Sometimes, the authentication fails because of executing several parallel sessions of a protocol, and because an agent may play both the initiator and responder role in parallel sessions. We take advantage of the notion of transition systems to specify authen...

Authentication of RFID tags is a challenging task due to the resource-constrained environment they are operating in. In this article, we present a top-down evaluation survey for RFID-tag authentication based on elliptic curves. First, we describe a general model to characterize different state-of-the-art public-key techniques that provide entity and message authentication. Second, we present pr...

Telephones remain a trusted platform for conducting some of our most sensitive exchanges. From banking to taxes, wide swathes of industry and government rely on telephony as a secure fall-back when attempting to confirm the veracity of a transaction. In spite of this, authentication is poorly managed between these systems, and in the general case it is impossible to be certain of the identity (...