Method and device for treatment of confidential codes.

摘要

Process for treating confidential codes in a system with secured functions (180) comprising the steps of: receiving a code; verifying a first enable conditioned by a first code for accessing a first function (180); authorizing access to the first function (180) if the first enable is recognized; use, if the first enable is not recognized, the code in order to verify a second enablement, conditioned by a second code different from the first code, to trigger at least one second function (170) and not revealing the fact that the code It does not allow to obtain the first authorization; wherein the step of verifying the second enabling comprises the operations consisting in obtaining a new code, by a second transformation (140) inverse of a first simple transformation that enables the holder of the first code to obtain the second code from a first code, and rerun the verification stage of the first authorization to test the new code.