Patent ID: 8712365

Claim:
A secured system for controlling the opening of lock devices, comprising: at least one lock device provided with electronic circuits for the conditional control of locking/unlocking mechanical members based on digital accreditation data (DOC), said lock device comprises a microcontroller configured for recognizing, analyzing and authenticating said digital accreditation data, and for unlocking the mechanical members upon recognizing compliant digital accreditation data; a mobile phone at the disposal of a user authorized to open the lock device; a remote management site comprising: a database of approved users with, for each user, an identifier associated with a mobile phone number an input for receiving digital accreditation data (DOC) adapted to allow the opening of specific lock devices, and a generator of encrypted acoustic accreditations configured to convert said digital accreditation data (DOC) into encrypted acoustic accreditation (CAC) in the form of single-use audio signals; and a mobile network operator, coupled to the management site and to the mobile phone, and configured for the secured transmission of the encrypted acoustic accreditations from the management site to the user's mobile phone, the phone comprising an electro-acoustic transducer adapted to reproduce said encrypted acoustic accreditations, wherein the lock device comprises an acoustic module comprising: an electro-acoustic transducer capable of picking up encrypted acoustic accreditations reproduced by the phone's transducer previously placed in the vicinity of the lock device; said acoustic module configured to extract said digital accreditation data (DOC) from the encrypted acoustic accreditation (CAC) picked up by the transducer, and to apply to said microcontroller the so-extracted digital accreditation data (DDC), wherein said acoustic module is configured to define an additional parameter of transmission of the accreditation and to produce, before any acoustic accreditation emission, an acoustic message encoded by said additional parameter; and further including an electro-acoustic transducer capable of reproducing said acoustic message, wherein said mobile phone comprises an electro-acoustic transducer configured to pick said acoustic message and to transmit to the management site a message coded by the acoustic message; the encrypted acoustic accreditation (CAC) produced by the acoustic accreditation generator includes said additional parameter, wherein the acoustic module is configured to checking the compliance of the additional parameter included in the picked up acoustic accreditation.