The security mechanisms like authentication and confidentiality is extremely difficult in a very content-based publish/subscribe system and because of the loose coupling of publishers and subscribers, authentication and confidentiality of publishers and subscribers is troublesome to realize. Above all content based approaches in broker-less environments don’t address confidentiality the least bit. This paper presents to produce confidentiality and authentication in a broker-less content-based publish-subscribe system. The authentication and confidentiality and alternative security approach of publishers and subscribers ensured, by adapting the certificate based mostly encoding mechanism.