Method for making secure the execution of an intermediate language software code in a portable device

摘要

A method for executing an application compiled in intermediate code on a portable digital appliance equipped with a virtual executing machine for interpreting the intermediate code. The method includes a step of applying a secure execution mode wherein the interpretation of the intermediate code by the virtual machine includes the following steps: for each item of data the code handled for execution of an arithmetic and/or logical operation defined by the code, generating control data, related to the data of the code via a predetermined function; in parallel with the execution of the operation, executing a control operation related to the operation defined by the code via the predetermined function, and acting on the control data.