The use of Identity Management (IdM) may leverage the trust in a distributed Publish-Subscribe (PubSub) system. An IdM provides mutual authentication between publishers, subscribers and message routers, enforces access control on message delivery and integrity control of message content. Access control is also a means to reduce traffic in a PubSub network since unauthorized message traffic will not be forwarded. A framework for providing identity management in a generic PubSub systems is presented and analyzed in this paper. The trust in the system relies to some extent on the use of hardware units for the protection of software integrity.