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In a word full of sensitive emails and digital banking information, good computer security is of paramount importance. The term 'computer security' is generally used as a blanket term for several subsections of digital security legal practices like internet law and computer forensics, network security concerns like authentication, security interests to do with secrecy like data encryption and cryptography and also the more business-orientated aspects of security like information risk management and information systems. Governments may also the term to include things that computers are used to protect against or give warning of, such as earthquakes and tsunamis.
It is obvious now that security architecture is an important field of study. It requires the architect to be constantly on their toes, effectively thinking of ways to outsmart everyone in the world with access and malicious intent as well as guarding the system from honest yet destructive mistakes (the latter of which are resoundingly more common). One must think like an experienced software designer and a completely new user at the same time. This is especially important in operating system design as every home computer, used by technophobes and those with computer science PHDs alike uses one. Technology from the 1980s led to some of the most impenetrable OS builds ever, yet the changes in system management they required were not widely understood and so these marvels of security only enjoy specific, limited use today. Security architecture has hardware aspects too, as one must position controls that promote confidentiality, integrity, assurance and accountability while still remaining available for widespread use.
One must understand that different situations require different degrees of security as well. In an ideal world, everything would be locked with cutting-edge security like that used in multinational corporations and military operations, yet in reality, one must always balance the benefits with the cost.