To make authenticated encryption which provides confidentiality and authenticity of a message simultaneously, a signcryption scheme uses asymmetric primitives, such as an asymmetric encryption scheme for confidentiality and a signature scheme for authentication. Among the signcryption schemes, the hybrid signcryption schemes are the signcryption schemes that use a key agreement scheme to exchan...

This paper presents several considerations on the hybrid TCP congestion control, in which lossbased schemes like TCP-Reno and delay-based schemes like TCP-Vegas are combined in a smart way. We firstly introduce simple analytical models of loss-based TCP, delay-based TCP and their hybrid. With support of experimental results, effectiveness of the hybrid TCP is proved. Then, we try to develop a m...

Different multicasting schemes in optical packet switched networks are discussed, including the parallel mode, serial mode, and hybrid mode multicasting schemes. Simulated modeling technique is applied to compare the network-level performance of the three multicasting schemes. A conclusion can be drawn from the results that since the hybrid-mode multicasting scheme can increase the multicast su...