VarySafe is a information security software especially for the people who need to release / send their digital document data to the specific data user frequently. VarySafe will prevent data user"s redistribution of released data to the other third-parties. It is also possible to set the expiration limit and user"s view/print permission. VarySafe uses hardware fingerprint authentication and data/viewer encapsulated stand alone executable file to prevent unwanted redistribution. The data in the executable file are fully encrypted by industrial strength encryption algorithm and will be decrypted only in the authentication passed user"s computer. Moreover, the stamp (It includes user"s hardware fingerprint and data make/open date string.) will be shown in the viewer"s data display area and viewer"s printing paper region to make a traceability when screen capturing and/or printing paper copying happens. Features: - Generate data/viewer contained stand alone executable file which only running in the author specified computer. - Set specific expiration date (After author specified date, executable file will not decrypt/open/view internal data and authentication will be expired.). - Set view or view + print permission. - Set stamp numbers on the viewer"s screen and print page (Stamp gives a traceability, in case of screen capturing and/or print paper copying.). - Use any printing data as a input by using VarySafe printer. - Use 2-byte languages data (e.g. Asian languages are supported.). - Send single data/viewer contained stand alone executable file without any application dependency (No viewer, no application is needed to use.). - Increase security by using industry proven crypto algorithms for data/viewer encryption and decryption (See the algorithms in following section.). - Increase security by running the executable file without any temporally files of the decrypted data (This makes secure environment for data recovery by using temporally file recovering.). - Increase security by excluding the decryption key string from the executable file (In the stand alone executable file, there is no data decryption key string inside. This technique able to increase security.). - Increase security by varying hardware fingerprint scheme (Each register user have there own hardware fingerprint scheme. This means that hardware fingerprint data are not compatible with each VarySafe register users, and each VarySafe register user makes there own hardware fingerprint generator.). - Increase security by varying binary versions of the stand alone executable files (Each stand alone executable files are not binary identical, if printing data are different. Moreover, different VarySafe register users generate different binary executable files even they use same printing data, because their hardware fingerprint schemes are all different. This verity make robust environment from the binary cracking attack of the data.