Design and Realization of Once a Secret Key Encrypt System
Xue Hui-feng · Computer Technology and Development · 2007
Once a secret key encrypt system in VC++6.0 environment is designed and realized.Aiming at the characteristic of file encrypting:there are the same or similar information about file type in the document's head and bottom,in order to prevent the infection which product those information to file encrypt,it put forward a specifically encrypting method aim at system,moreover,the encrypting's validity put up validate using the method of unlimit enumerate and analyse decrypt.At the same time designed and realized secret key producing system,through the especially arithmetic,make the serial number of secret key is more close to random serial number.User can enter secret key's serial number,the system automatically use the correspond secret key encrypt to the file,and also can user-definde secret key,updated the secret key in a period of time,insure the system possess upper security.