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Security(3), email security(4), security software(18), "Computer
security" Definition: Computer security is a branch of
technology known as information security as applied to
computers. The objective of computer security varies and can
include protection of information from theft or corruption, or
the preservation of availability, as defined in the security
policy. Computer security imposes requirements on computers that
are different from most system requirements because they often
take the form of constraints on what computers are not supposed
to do. This makes computer security particularly challenging
because it is hard enough just to make computer programs do
everything they are designed to do correctly. Furthermore,
negative requirements are deceptively complicated to