Method for securing application software from a processing unit and secret storage unit and system therefor

摘要

The invention provides a method of making a user piece of software secure by means of a user processing and memorizing unit ( 11 _u) containing at least one user secret (S_u). According to the invention, the method consists in: making a user piece of software and modified data (D') available to a user; and in a stage of running the user piece of software with the associated modified data (D'), enabling the user possessing the user unit ( 11 _u) to recover the original data (D) from the modified data (D').