SECURITY

Security is the set of mechanisms and techniques which prevent unauthorised access to resources or disclosure of information

• Multi-access systems must prevent unauthorised access of resources belonging to one user by another user
• Authorised sharing is ok
• Security Policy specifies what security is provided :
  what is protected
  who is allowed what access
  what protection mechanisms should be used
• Security Mechanisms : how is security policy implemented
  the same mechanism can however support different policies
• Security Includes : Threat Analysis, Access control, Confidentiality and Encryption and Security management

Will primarily look at access control and protection mechanisms