s
Security in Operating
Systems
Security and protection
Protection mechanisms implement security
policies
Protection is a mechanism
Security is a policy
what are we protecting
Software
Hardware
Data
Communications lines and networks
security goals
Integrity
Confidentiality
Availability
Mechanisms vs Policies
Policies determine what will be done
Mechanisms determine how to do something
impotant security mechanisms
Access control mechanisms
Encryption
Authentication
Passwords
Use of Passwords
Attacks on Passwords
Password Selection Criteria
breaches
Vulnerability
Exposure
Threats
