Security communication method, system, and apparatus permitting to change the security type

摘要

The object of the invention is to provide an apparatus, system and method for the security communication, wherein the level of the security communication can be automatically determined corresponding to the communication with the destination. The invention comprises inquiry means inquiring a specific security information apparatus of the security type and security type selecting means selecting the security type according to the reply corresponding to the inquiry. The security information apparatus comprising storage means storing associating information that associates terminal specifying information of a communication terminal with a recommendable security type to the communication with the communication terminal, recommendable security type managing means selecting the recommendable security type in response to the inquiry of the recommendable security type to the communication terminal from the other communication terminal, and sending and receiving means sending the selected recommendable security type. <IMAGE>