Nowadays, information is one of the very important assets in almost all organizations. Once the internal networks of those organizations are connected to the Internet, it becomes a potential target for cyber attacks. In order to secure the systems and information, each company or organization should conduct a self-hacking-audit, analyze the threats and eliminate it beforegetting any problem. This paper explains about the main goals of information security, its major threats and some suggestions to prevent the systems from major threats.

Unconventional and low - cost software implemented testing technique for processor transient faults are briefly discussed here. On-line signatures of the Processor Status Register have been used here for detecting transient faults.