Software Security has received a lot of attention during the last years. It aims at preventing security problems by building software without the so-called security holes. One of the ways to do this is to apply specific patterns in software architecture. In the same way that the well-known design patterns for building well-structured software have been used, a new kind of patterns, called security patterns have emerged. The way to build secure software is still vague, but guidelines for this have already appeared in the literature. Furthermore, the key problems in building secure software have been mentioned. Finally, threat categories for a software system have been identified. Based on these facts, it would be useful to evaluate known security patterns based on how well they follow each guideline, how they encounter with possible problems in building secure software and for which of the threat categories they do take care of.
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