computer security is the protection of the items you value, called the assets of a computer or computer system.
Assests[HW, SW, data, people, processes]

computer security is the protection afforded to an unautomated information system in order to attain the applicable objectives of preserving the integrity, availability, confidently of information system resources include (HW, SW, FW, info, data, tele)

Main security goal

the ability of a system to ensure that an asset is viewed only by authorized parties

the concealment of information or resources from unauthorized users

A reason that could lead to the failure of Confidentality is

To acheive higher .... is supported by access control & cryptography

When unauthorized access occured information is meaningless

Ensures only authorized personeel have access to the infromation

the ability of a system to ensure that an asset is modified only by authorized parties

trusting the worthiness of the data or resource and to prevent improper or unauthorized change

Ensure the source of the data using authentication techniques

Ensure the correctness of the content of the data

techniques used in integrity

This uses technologies to report when unauthorized modification occurs

This uses technologies for blocking unauthorized attempt to modify data

the ability of a system to ensure that an asset can be used by any authorized parties

The main objective of ... is to ensure that authorized access to data when desired is achievable

The most dangerous availability attack

A service is said to be available if