This paper presents a secure authentication and authorization management mechanism for protecting privacy in sensitive information systems. It allows involved individuals and group participants to achieve high security levels and tight authorization control. The need of sharing long term secrets to authenticate individuals and group users is eradicated in the proposed protocol by dynamic keys. ...

Secure group communication is an increasingly popular research area having received much attention in the last several years. The fundamental challenge revolves around secure and efficient group key management. While centralized methods are often appropriate for key distribution in large groups, many collaborative group settings require distributed key agreement techniques. This work investigat...

Secure group communication (SGC) has attracted much attention, as group-oriented communications have been increasingly facilitating many emerging applications that require packet delivery from one or more sender(s) to multiple receivers. Of all proposals reported, most have focused on addressing the issue of key management to SGC systems. The authors, however, advocate that security services ar...

Group key agreement is a fundamental building block for secure peer group communication systems. Several group key management techniques were proposed in the last decade, all assuming the existence of an underlying group communication infrastructure to provide reliable and ordered message delivery as well as group membership information. Despite analysis, implementation and deployment of some o...

Group Key Establishment is fundamental for a variety of security mechanisms in group applications. It allows n ≥ 2 principals to agree upon a common secret key. This can further be classified into Group Key Exchange (or Group Key Agreement), where all the principals participate in the construction of the key, and Group Key Transport (or Group Key Distribution), where the key is chosen by a sing...