The book Crackproof Your Software, written by Defendion's founder and Chief Technology Officer Mr. Pavol Cerven, is designed to help all programmers who have ever written their own software to learn how to protect their software from illegal copying. The book highlights the weak points in "well-protected" software, shows how crackers break common protection schemes, and how to defend against crackers. The book includes in-depth discussions on anti-debugging and anti-disassembling. It is also useful to programmers creating freeware who wish to protect their source code.