Threat to life and property necessitate the need for security (lock) systems which has evolved with technological advancement. Existing literature does not present first hand information to researcher to ascertain the research gap. This paper presents a review of some literatures in intelligent security lock systems, by presenting their concepts, the advantages and the drawback of such concept and the possible modification. Each of the literature reviewed is categorized into either single or multiple protocols depending on the number of security feature in the lock system. A single protocol system has one security feature while the multiple protocols have several security features. The approach produces a unique result which solves the problem of laborious literature survey.