security and privacy in c

[saneha]

lease tell me in detail about security and privacy

[Vuhelper]

Defining "computer security" is not trivial. The difficulty lies in developing a definition that is broad enough to be valid regardless of the system being described, yet specific enough to describe what security really is. In a generic sense, security is "freedom from risk or danger." In the context of computer science, security is the prevention of, or protection against, • access to information by unauthorized recipients, and • intentional but unauthorized destruction or alteration of that information1 This can be re-stated: "Security is the ability of a system to protect information and system resources with respect to confidentiality and integrity." Note that the scope of this second definition includes system resources, which include CPUs, disks, and programs, in addition to information.
A feature of a voice mail system that allows a sender to mark a message as private or confidential, thereby denying the recipient the ability to forward it to another user is the privacy.