Key management plays a very important role in the data communications. CBCEGKM is a key management scheme that provides more efficient and secure methods for key generation and utilization. This papers deals with the analysis of CBCEGKM with respect to communication overhead, computation cost, etc. The analysis shows that CBCEGKM comprises of the most reliable methods for key generations and he...

Many group key agreement protocols (GKA) for secure group communication (SGC) based on the Diffie-Hellman key exchange principle have been proposed in literature. All of these protocols require member serialization and/or existence of a central entity. In this paper, we propose a simple group Diffie-Hellman key agreement protocol which removes these two limitations. Moreover, the new protocol n...

Securing group communications in dynamic and large-scale groups is more complex than securing one-to-one communications due to the inherent scalability issue of group key management. In particular, cost for key establishment and key renewing is usually relevant to the group size and subsequently becomes a performance bottleneck in achieving scalability. To address this problem, this paper propo...

QoS is the presentation level of service presented by a network to the user. The objective of QoS is to accomplish more deterministic system activities so that the information conceded by the network can be better conveyed and the resources can be better employed. QoS routing and security is the process of offering continuous free paths to guarantee the required QoS parameters. The security of ...

In this paper, we show that Bresson-Chevassut-Essiari-Pointcheval’s group key agreement scheme does not meet the main security properties: implicit key authentication, forward secrecy, and known key security. Also, we propose an improved version which fixes the security flaws found in the scheme.

Many emerging interactive and collaborative applications use the peer-to-peer paradigm nowadays. In every-day life peer-to-peer meetings of small groups are dominant, e.g. for business talks. Confidentiality is of primary concern in this context to provide group privacy. To assure confidentiality the partners have to agree upon a secret group key for encrypting their communication. This require...

In 2012, Piao et al. proposed a polynomial-based key management for secure intra-group and inter-group communication. In this notes, we point out that there are some security weaknesses of Piao et al.’s intra-group key distribution scheme. One main problem is that their scheme cannot prevent a group member to obtain other members’ secret keys shared with the controller. In addition, their schem...

This paper presents group key distribution techniques for highly mobile, volatile and hostile wireless networks in tactical situations (e.g., anti-terrorist operations, battle fields). The techniques proposed here are based on the self-healing key distribution methods (with revocation capability) recently developed by Staddon et al. [37]. By introducing a novel personal key distribution techniq...

Group key transfer protocols allow multiple parties to share a common secret key. They rely on a mutually trusted key generation center (KGC) that selects the key and securely distributes it to the authorized participants. Recently, Sun et al. proposed an authenticated group key transfer protocol based on secret sharing that they claim to be secure. We show that this is false: the protocol is s...

In this paper, we show that Bresson-Chevassut-Essiari-Pointcheval’s group key agreement scheme does not meet the main security properties: implicit key authentication, forward secrecy, and known key security. Also, we propose an improved version which fixes the security flaws found in the scheme.