Lecture_1

What Is Security?
Computer Security
The protection afforded to an automated information system in order to attain the applicable objectives of preserving the integrity, availability, and confidentiality of information system resources.
Network and Internet Security
Measures to deter, prevent, detect, and correct security violations that involve transmission of information.
Key Security Concepts
Confidentiality
Preserving authorized restrictions on information access and disclosure, including means for protecting personal privacy and proprietary information.
Integrity
Guarding against improper information modification or destruction, including ensuring information nonrepudiation and authenticity.
Availability:
Ensuring timely and reliable access to and use of information.
Impact of Security Breaches
How do security breaches impact organizations?
Effectiveness of primary operations are reduced
Financial loss
Damage to assets
Harm to individuals
??OSI Security Architecture
ITU-T (International Telecommunication Union, Telecommunication Standardization Sector) X.800 Security Architecture for OSI.
It provides a systematic way od defining and providing security requirement.