An agile network protocol for secure communications with assured system availability

[Subject] The アジル network protocol for the safe communication which has the guaranteed system availability is realized. [Means for Solution] A move window of an appropriate address is defined, a data packet which is not in agreement with a standard accepts, and is further processed, and Paquette who does not meet this standard refuses. "Not only hopping" of an IP address and the discriminator field but hardware addresses, such as a media-access-control address, are enabled to hop. An address to which it hops has the non-repeating sequence length who can determine easily a priori, Only numbers arbitrary at high speed of random steps can be jumped first one by one, and it is generated by random number generating program in which guessing a random number of the future has the difficult characteristic unless a parameter of a random number generating program is known. A synchronization is re-established between a transmitting side node and a receiving side node using synchronous technique. [Chosen drawing] Drawing 1