公开(公告)号：US20200004952A1

公开(公告)日：2020-01-02

申请号：US16456533

申请日：2019-06-28

Applicant: INGENICO GROUP

Inventor： Christian Rolin ,  Maxime Bernelas

IPC: G06F21/51 ,  G06F21/12 ,  G06F21/56 ,  G06F21/57

Abstract: A method for determining validity of a code of an application. The method is implemented within an electronic device having a processor, a non-secure memory and a secure memory. The method includes at least one iteration of: loading the application in the non-secure memory, delivering a current application code; determining a current footprint of the current application code; obtaining, within the secure memory, a reference footprint associated with the application; comparing the current footprint with the reference footprint; and when the current footprint is identical to the reference footprint, validating the current application code, including: executing an optimization process of the current application code, delivering an optimized application code; determining a post-optimization footprint of the optimized application code; and recording the post-optimization footprint in the secure memory as a new reference footprint associated with the application.

公开(公告)号：US10318766B2

公开(公告)日：2019-06-11

申请号：US15344067

申请日：2016-11-04

Applicant: INGENICO GROUP

Inventor： Christian Rolin ,  Laurent Muller ,  Mohammed Bellahcene ,  Jessica Royer ,  Jean-Christophe Pommaret

IPC: G06F11/30 ,  G06F21/78 ,  H04L9/32 ,  G06F12/14 ,  G06F21/62 ,  G06F21/64 ,  H04L9/08

Abstract: A method for the secured recording of data, implemented in a data-recording device having a first non-secured memory and a second secured memory, is disclosed. The method has the steps of: obtaining a derived key corresponding to the data in the second memory from a root key recorded in the second memory; encrypting data using the derived key, delivering encrypted data; recording the encrypted data in the first memory; determining a hash imprint of said data; recording said hash imprint in a hash file recorded in the first memory; recording a general hash imprint, representing the content of the hash file comprising said hash imprint, in the second memory; and eliminating the data in the second memory.