Patent ID: 9646516
Date: 2017-05-09
CPC Classifications: G06F,G09C,H04L

Claim:
1. A method for personalizing an electronic device, comprising: obtaining sensitive data by way of a third-party device composed of a CPU, a memory having coded instructions stored therein for operating the CPU, and a communications bus in communication with the CPU; at the third-party device, masking the obtained sensitive data using a masking method based on a standard cryptographic algorithm defining a ciphering algorithm, and a deciphering algorithm that uses more resources than the ciphering algorithm, said masking including a step of masking the sensitive data by applying the deciphering algorithm to said sensitive data to obtain masked sensitive data; storing the masked sensitive data in the electronic device so as to personalize the electronic device; unmasking the masked sensitive data, by applying the ciphering algorithm to the masked sensitive data to obtain sensitive data in plain form, wherein the unmasking with the ciphering algorithm comprises at least one instance of access to a table stored in a memory, wherein the number of instances of access to the table when unmasking with the ciphering algorithm is less than the number of instances of access to this same table anticipated in the deciphering algorithm, and wherein a plurality of instances of access to masked sensitive data is carried out, each instance of access comprising a step of unmasking by applying the ciphering algorithm to the masked sensitive data to obtain sensitive data in plain form.