The invention authenticates processes and inter-process messaging. In some examples of the invention, security is performed in three layers--the application layer, the middleware layer, and the transport layer. Some examples of the invention include software products. One software product comprises security software and middleware software stored on a software storage medium. The security software directs a processor to receive a log-in request for a process, generate a request to authenticate the process, transfer the request to authenticate the process, receive a security association for the process, and transfer the security association. The middleware software directs the processor to receive the security association from the security software, receive a message from the process, insert the security association into the message, and transfer the message. Another software product comprises security software stored on a software storage medium. The security software directs a processor to receive a request to authenticate a process, authenticate the process, generate a security association for the process, store the security association, transfer the security association, receive the security association extracted from a message, and check the security association extracted from the message with the stored security association to authenticate the message.