Abstract: Communication and collaboration tools such as Instant messaging and Chat applications are broadly used applications in our today’s life in all societies and for all fields. However the main problem that these applications suffer from is to ensure secure communication between the end-points which are involved in such communication in order to keep the privacy and secrecy of the transmitting information especially if these applications used in closed secret meeting system. In this study a proposed secure Instant messaging and Conference system will be built to support secure transport of the main triple media (text, audio, video) using a mixture of the most common security algorithms (RSA, AES, SHA512 and ECDiffie-Hellman) in the direction to achieve the basic three security goals (Confidentiality, Integrity and Authentication) for the different operations occurred in the proposed system.