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US 2020/0394337 A1Published application
Electronic circuit
AssigneeSTMicroelectronics (Rousset) SAS
InventorFabrice MARINET
Life of this patent
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Abstract
An electronic circuit includes an interface, a read-only memory in which encrypted data are stored, and cryptographic circuitry coupled to the interface. In operation, the cryptographic circuitry uses a decryption key received via the interface to decrypt the encrypted data. The electronic circuit performs one or more operations using the decrypted data.
Claims23
An electronic circuit, comprising:
- an interface, which, in operation, receives a decryption key;
- a read-only memory in which encrypted data are stored;
- and
- cryptographic circuitry coupled to the interface, which, in operation, uses the decryption key received via the interface to decrypt the encrypted data, wherein, in operation, the electronic circuit performs one or more operations using the decrypted data.
1 more element
A method, comprising:
- receiving, by an electronic device, a decryption key via an interface of the electronic device;
- decrypting, using the decryption key, encrypted data stored in a read-only memory of the electronic device;
- and
- performing, by the electronic device, one or more operations using the decrypted data, wherein the decryption key is not stored in the electronic device prior to receipt of the decryption key via the interface.
1 more element
A system, comprising:
- a first electronic device;
- and
- a second electronic device coupled to the first electronic device, the second electronic device including:
- a read-only memory in which encrypted data are stored;
- and
- cryptographic circuitry coupled to the read-only memory, which, in operation, uses a decryption key received from the first electronic device to decrypt the encrypted data, wherein, in operation, the second electronic device performs one or more operations using the decrypted data.
3 more elements
Dependencies are inferred from the claim text.