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The IP Multimedia Subsystem (IMS) defined by 3GPP is designed to provide robust multimedia applications over diverse access technologies. A promising solution to protect such applications is to use the Secure Internet Protocol (IPSec); however, IPSec has some drawbacks, particularly on the performance and the QoS of real-time applications. On the other(More)
Security and privacy become mandatory requirements for VoIP communications that needs security services such as confidentiality, integrity, authentication, non-replay and non-repudiation. The available solutions are generic and do not respect voice specificities and constraints. Thus, QoS of the voice is affected by delay, jitter, and packet loss. New(More)
Session Initiation Protocol (SIP) is an open standard protocol and constitutes the provisioning of services like Internet Telephony and Instant Messaging. Vulnerabilities in SIP have made it possible to exploit it and launch many of the known internet attacks and also few specific attacks, thus affecting the services deploying SIP for session management. To(More)
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