Comparative Study of Software Protection Strategy

With the increasing popularity of computer,software industry is developing rapidly.In order to safeguard the interests and scientific research,technology and copyright of developers and purchasers of software,it is necessary to encrypt the software.This paper describes the types of protection software.These types are of advantages and disadvantages,it is difficult to say which one is the best,the conclusion depends on the evaluation of your program code and the authors of the preferences.