Application Research Of The Contemporary Cryptography Algorithm To Software Serial Number Protection System

The study of the cryptology originated in of 400 BC, it is the invention of computer between 1949 -1975, that made it possible for complex calculations ,as well as great development of Cryptology; In the numerous fields of the information technology, cryptology is playing an important role.Software serial number protection system is a software encryption system which serves for datum protection and pirate behavioral prevention .It is extensively employed at present, especially used for passing on the shared software released on the Internet .Because of its efficiency, wide coverage and low cost, so the most software both at home and abroad adopt this way and is released at present.It is classified that there are three Contemporary cryptography algorithms: Symmetrical algorithm; Asymmetrical algorithm; Hash and Mac algorithm. This graduation project mainly researches how protecting advanced cryptography algorithm and software sequence number protecting system can be integrated, thus enable the software developer to apply these algorithms to the software protectiion system directly, but not use the comparatively simple self-defining algorithm to encrypt the software.Through encrypt algorithm function of dll transferring, it is more efficient to realize the protection of key datum and produce the registering machine and registration code convenient and swift. Therefore, developers can have more time and energy for the development of software.