On QoP method for ensuring availability of the goal of cryptographic protocols in the real-time systems
Bogdan Ksi̜eżopolski, M. Curie-Skłodowskiej, Zbigniew Kotulski, Paweł Szałachowski · 2011
Cryptographic protocols are secure due to applica- tion of security services. The security services applied fo r their protection can be classified into the three groups: hard, sof t and extended. Among the extended ones, we can point out to the availability of the goal of the security protocol, which guarantees that protocols aims are achieved. In the real-time protocols as the video conference, the goal is both secure data transmission and good signal quality. When one of the goals is not ensured, the availability of the goal of the protocol is not guaranteed and the cryptographic protocol can not be realized. In this article we present the methodology of obtaining the balance between the quality of the signal in real-time systems and accomplishment of the required security services. Finally, the case study of video conference secured by VPN connections, is presented. I. I NTRODUCTION