Crackproof Your Software (repost)

Crackproof Your Software is an essential resource for all software developers. It effectively teaches how to protect software against unauthorized copying and distribution. The book highlights weak points in seemingly well-protected programs. Software developers will learn how crackers break common protection schemes and how to defend against them. The book begins by introducing the developer to the techniques and programs most frequently used by crackers and discusses the basic types of protection and common protection errors.