Patent ID: 8374198

Claim:
A communication relay system for relaying communications performed between a plurality of communication terminals according to a plurality of communication protocols, the system comprising: a plurality of pseudonymous identification information acquiring units associated with each of the plurality of communication protocols respectively, wherein each of the pseudonymous identification information acquiring units acquires pseudonymous identification information which is information according to the communication protocol associated with the pseudonymous identification information acquiring unit and is different from terminal identification information for identifying each of the communication terminals; and a communication relay unit which, when receiving communication information according to at least one of the plurality of communication protocols from a source terminal which is one of the communication terminals, replaces source terminal identification information which is included in the communication information and is the terminal identification information for identifying the source terminal as the communication terminal serving as a source of the communication information, with the pseudonymous identification information acquired by each of the pseudonymous identification information acquiring units, and transmits the communication information after replacement to a destination terminal which is another one of the communication terminals.