Proposed Enhance Authentication by Development of El Gamal Subliminal Channel

The subliminal channels are covert channels that can be used to communicate secretly in a normal looking communication over an insecure channel. This channel in a cryptographic protocol such as an authentication system or a signature scheme provides an additional channel from the sender to an authorized receiver and can't be read by any unauthorized receiver. This paper proposed development for “EI-Gamal subliminal channel”, which supports authentication and security aspects, but it is inappropriate algorithm for computers network. So, the development was necessary to provide a new appropriate and powerful algorithm to be used in such networks. The proposed algorithm depends on the difficulty of factorizing the large integer number into its primitive elements p and q.