Patent ID: 11954196
Assignee: LEDGER, SAS
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. An electronic device for performing a transaction, the electronic device being configured to initiate an operational phase of the transaction upon receipt of a command from a user, and to perform, during the operational phase, a specific operation in order to provide the user with a determined service corresponding to the intended transaction, the electronic device comprising confidential data including one preliminary question and one preliminary answer, and being configured to:
during a preliminary authentication phase of the electronic device by the user:
receive a preliminary question;
provide, as an answer to the preliminary question, the preliminary answer; and
enable the user to prevent execution of the operational phase if the user so wishes after receiving the answer from the electronic device;

during an authentication phase of the user by the electronic device:
provide an operational question to the user;
receive an answer from the user, and compare the user's answer with an expected operational answer; and
delete the confidential data if it has not received the preliminary question during a predetermined number of executions of the preliminary authentication phase of the electronic device by the user.