INTRODUCTION

Computer security is a vast field that touches all aspects of data confidentiality, integrity and availability for suitably controlling access to data. Access control is only one of the ten domains of Information Systems Security categorized by the International Information Systems Security Certification Consortium (ISC) 2 which is responsible for certifying Information Systems Security professionals globally.

Out of the two aspects of security, the proactive comprises of detective, preventative and deterrent measures while the reactive deals with corrective, investigative, recovery and compensatory measures taken to guarantee a certain degree of data assurance. Most of what is studied today in computer security only emphasizes the proactive components. Owing to many factors, investigating root cause analysis and studying computer usages or file structures to determine exploitable trends have never been the norm in most environments.

This paper introduces the reactive part of computer security otherwise called computer forensics.

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