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Security is a major requirement on every telecommunications system. Everyday brings new technologies, techniques and standards; in order to guarantee these telecommunication systems a complete solution to secure networks. Since IP Multimedia Subsystem (IMS) is an evolving standard that intends to support Next Generation Networks (NGN) and Next Generation Mobile Networks (NGMN), its security techniques...
A crucial aspect when establishing a secure peer-to-peer communication channel is the negotiation of the security parameters used to protect the successive data communications, including the various encryption and authentication keys. There are different secure protocol (such as IPSec, TLS, SSH, etc.) currently defined with their own negotiation mechanisms; unfortunately they usually rely on a pre-established...
We propose a DRM oriented authenticated group key agreement scheme from multilinear forms. The new scheme is ID-based, but need not trusted PKG and random oracle model, which effectively solves the key escrow problem. Our scheme can be used to replace the keys distribution scheme of existing DRM system, which avoids the trouble to build trusted channels between each pairs of users. The ID-based cryptography...
Using various multimedia services through Session Initiation Protocol (SIP), the dispute issues must be concerned because subscribers of application service providers may repudiate service consumption fee. However, the related standards of SIP and accounting do not specify any mechanism to settle this dispute. In this paper, a non-repudiation mechanism for SIP accounting is presented to address the...
The advent of ubiquitous computing and the convergence of the heterogeneous networks provide new opportunities for the new players to enter the operator market. While network access will be available everywhere, the multitude and diversity of the access operators makes it hard to rely on the old paradigms of static operator relationships guaranteeing the identity of the users end-to-end. Therefore,...
Multicasting is an efficient communication mechanism for group-oriented applications such as videoconferencing, broadcasting stock quotes, interactive group games, and video on demand. The lack of security obstructs a large deployment of this efficient communication model. This limitation motivated a host of research works that have addressed the many issues relating to securing the multicast, such...
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