Internet and other computer technologies become very essential for libraries. Libraries need to have policies; protection measures and trained staff in place in order to safeguard their investments in computer and computer-related technologies, personnel and services. This paper will cover Information Security methods used in Private Engineering College libraries of Indore city. Instead of giving detailed instructions for security techniques, the emphasis here is on finding the various techniques used in library environments. Security of information is a regular process due to new techniques adopted by the libraries time to time. This article cover the security techniques used in libraries.