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Security presents a big challenge for transmitting voice traffic over the Internet. The goal is to acquire the same security level offered.
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)
Multimedia sensors are attracting the attention of the researchers increasingly, and have shifted the focus from traditional scalar sensors to sensors equipped with multimedia devices. The characteristics of multimedia services impose more resource constraints that involve energy consumption, memory, buffer size, bandwidth, and processing capabilities.… (More)
One of the major challenges for Real-time applications over next-generation heterogeneous networks is the seamless vertical handoff. These applications require fast and efficient handover that realize service continuity and seamless mobility preserving the security and the QoS. In this paper we propose a new seamless vertical handover solution performing… (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)