Security System In Message Middleware Of TongLINK/Q

This thesis introduces the security system in Message Middleware TongLINK/Q of TongTech Company. It includes functions of TongLINK/Q, Using RC5 encryption algorithm, MD5 message digesting algorithm, Diffie-Hellman key exchanging algorism to implement point-to-point security. This thesis also introduces how to use key and key-table distribution in local group to implement end-to-end security.The thesis intend to introduce usage of the security algorithms in TongllNK/Q, and give the reasons that we choose them, but not to give a detailed description of those algorithms in a mathematic way.