Mobile communication is definitely one of the major high-technology applications that offer present-day people a modern life of appropriate convenience. In recent years, the third generation cell-phone system has approached maturity. The Universal Mobile Telecommunication System (UMTS) is currently the most widely used system around the world. The 3rd Generation Partnership Project is equipped ...

Several group key protocols have been presented in the literature to enable secrecy of communication among dynamic groups of participants. However, there is a lack of consistency in the literature in terms of operations supported and performance metrics of the various protocols. This makes it difficult for designers to choose the best protocol for their specific applications. To alleviate this ...

A class of efficient key agreement protocols proposed by Boyd is examined. An attack is demonstrated on a round-optimal example protocol of this class, and a simple countermeasure is suggested. The whole class is known to be vulnerable to an attack proposed by Bauer, Berson and Feiertag. A new class of key agreement protocols without this vulnerability but having the same advantages in efficien...

We discuss a recently proposed one-pass authenticated key agreement protocol, by Mohammad, Chen, Hsu and Lo, which was “derived” from their correponding two-pass version and claimed to be secure. We show that this is not the case by demonstrating a number of vulnerabilities.

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 ...

Due to the very limited computing resource, storing space and electric power supply of tag, it is a great challenge for us to design a practical RFID protocol which is security, efficient and can be used in the low-cost tag. In 2007, He et al. proposed an authentication and key agreement protocol which is used in the process of communication between the low-cost tag and reader. They also proved...

Utilizing the advantage of quantum entanglement swapping, a multi-party key agreement protocol with authentication is proposed. In this protocol, semi-trusted third party introduced, who prepares Bell states, and sends one particle to multiple participants respectively. After that can share Greenberger-Horne-Zeilinger state by swapping. Finally, these measure particles in their hands obtain an ...