The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2026
Filed:
Dec. 16, 2021
Nagravision Sàrl, Cheseaux-sur-Lausanne, CH;
Luis Ruiz, Cheseaux-sur-Lausanne, CH;
Didier Hunacek, Cheseaux-sur-Lausanne, CH;
NAGRAVISION SARL, Cheseaux-sur-Lausanne, CH;
Abstract
A method for controlling access to a resource in an electronic device including a secure element with a permanent memory having an OTP area. The method includes the following steps performed first when the secure element or the electronic device boots: checking presence of at least one of a secret data and an initialization value in the permanent memory and, in a negative event, generating an initialization value and storing it into the OTP area, in a positive event, if the permanent memory includes secret data, decrypting, within the secure element, the secret data by using an algorithm using a cryptographic key and, if the permanent memory further includes an initialization value, the initialization value, and checking the integrity of the secret data by using a signature stored in the permanent memory and, on successful completion, providing access to the resource.