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It is widely known that information technology applications should be secured. During the last years, special efforts have been applied to achieve a great level of security. These efforts have increased the security in some aspects, such as cryptographic algorithms, authentication techniques, etc. But many other security holes have appeared in this kind of applications, making the improvements achieved a "waste of time and money". In this paper, some of these security holes are exposed. Using security hardware modules can overcome some of these holes, if they are designed according to the applications' specification.