Group-oriented services and wireless communication networks are among the emerging technologies of the last few years. Group key management, which is an important building bloc in securing group communication, has received a particular attention in both academic and industry research communities. This is due to the economical relevance of group-based applications, such as video on demand, video...

advanced metering infrastructure (ami) is a key part of the smart grid; thus, one of the most important concerns is to offer a secure mutual authentication.  this study focuses on communication between a smart meter and a server on the utility side. hence, a mutual authentication mechanism in ami is presented based on the elliptic curve cryptography (ecc) and one time signature (ots) consists o...

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...

ID-based public key systems allow the user to use his/her identity as the public key, which can simplify key management procedure compared with CA-based public key systems. However, there is an inherent disadvantage in such systems: the problem of private key escrow, i.e., the “trusted” Private Key Generator (PKG) can easily impersonate any user at any time without being detected. Although the ...

This paper describes support for batch rekeying in Mykil, a key management system for supporting secure group multicast. Batch rekeying in Mykil allows for substantial reductions in the cost and complexity of rekeying operations, arguably the expensive portion of the system. By accumulating join and leave operations and utilizing an algorithmic approach to minimize the number of necessary rekey...

The problem of distributing multimedia securely over the Internet is often viewed as an instance of secure multicast communication, in which multicast messages are protected by a group key shared among the group of clients. One important class of key management schemes makes use of a hierarchical key distribution tree. Constructing a hierarchical tree based on secret shares rather than keys yie...

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 large-scale client-client communication environments, Password-Authenticated Key Exchange (PAKE) based on trusted server is very convenient in key management. For enhancing the efficiency and preventing various attacks, Wang and Mo proposed a three-PAKE protocol, Yoon and Yoo proposed a C2C-PAKE protocol. However, in this paper, we show that the Wang-Mo protocol and the Yoon-Yoo protocol exi...