It is similar to systems engineering in that it is an incentive for a system to meet requirements, but with the added side of implementing a security policy.
It
has existed as an informal area for centuries, in the areas of security locking
and printing.
Technological
advances, particularly in the field of computing, have now allowed the creation
of far more complex systems, with new and complex security problems.
As
today’s systems cut across many areas of human endeavor, not only do security
engineers need to consider the mathematical and physical features of systems;
they also need to consider attacks on the people who use and make parts of
these systems using social engineering attacks.
Secure
systems must resist not only technical attacks, but also coercion, fraud, and
deception by confident actors.
For
this reason it covers areas of social science, psychology and economics, as
well as physics, chemistry and mathematics.
Some
of the techniques used, such as scanning, come from safety engineering.
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