Abstract: The present invention relation to a method and device for protecting a software program from unauthorized use, comprising a processor, a non-volatile memory, a content protection means, and a communication interface, wherein the non-volatile memory records and stores at least one functional fragment extracted from the said software program, wherein at least one transfer function is embedded into the remaining part of the software program for sending to the software protection device initial data and/or commands initiating execution of the extracted fragment to produce result data, and sending the result data to the programmable computer device, thus preventing hacking of the said software program. The software protection device can be implemented as an external or internal computer module.