Knowledge management is the methodology for systematically gathering, organizing, and disseminating information. It essentially consists of processes and tools to effectively capture and share data as well as use the knowledge of individuals within an organization. Knowledge Management Systems (KMS) promote sharing information among employees and should contain security features to prevent any unauthorized access. Security is becoming a major issue revolving around KMS. Security methods may include authentication or passwords, cryptography programs, intrusion detection systems or access control systems. Issues include insider threat (protecting from malicious insiders), infrastructure protection (securing against subversion attacks) and establishing correct policies and refinement and enforcement. Furthermore KMS content is much more sensitive than raw data stored in databases and issues of privacy also become important.