A method for securing an electronic device, a security...

Details A method for securing an electronic device, a security... A method for securing an electronic device, a security...

G - Physics

06

F

G06F 1/00 (2006.01) G06F 12/14 (2006.01) G06F 21/00 (2006.01) H04L 9/30 (2006.01) H04L 9/32 (2006.01)

Patent

CA 2450844

The invention relates to a method for securing the trustworthiness of an electronic device (1). At least first (DID, S1, PK1) and second (S2, PK2) check-up data are stored in the electronic device (1). In the method, a boot program is started (501), in which boot program at least first (P1) and second (P2) boot steps are taken. In the first boot step, the trustworthiness of said at least first check-up data (DID, S1, PK1) is examined, wherein if the check- up shows that said at least first check-up data (DID, S1, PK1) is trusted, said second check-up data (S2, PK2) related to at least the second boot step is examined to confirm the trustworthiness of the second boot step. If the check-up shows that at least one second check-up data (S2, PK2) related to the second boot step is trusted, said second boot step (P2) is taken after said first boot step (P1).

L'invention concerne un procédé servant à sécuriser un dispositif électronique (1). Ce dispositif électronique (1) mémorise au moins des premières (DID, S1, PK1) et deuxièmes (S2, PK2) données de vérification. Ce procédé consiste à démarrer un programme d'amorçage (501) comportant au moins une première (P1) et une deuxième (P2) étapes d'amorçage. La première étape d'amorçage consiste à examiner la fiabilité desdites premières données de vérification (DID, S1, PK1), puis, si la vérification démontre que lesdites premières données de vérification (DID, S1, PK1) sont fiables, à examiner lesdites deuxièmes données de vérification (S2, PK2) relatives à au moins la deuxième étape d'amorçage afin de confirmer la fiabilité de cette deuxième étape d'amorçage. Si la vérification démontre que les deuxièmes données de vérification (S2, PK2) relatives à la deuxième étape d'amorçage sont fiables, ladite deuxième étape d'amorçage (P2) suit la première étape d'amorçage (P1).

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