Integrated circuit with coded security signal, security process, corresponding security device and signal coded using a dynamic key
AssigneeAtmel Nantes SA
InventorKarl Courtel
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Abstract
An integrated circuit is provided, which comprises at least one security module, controlled by at least one security signal, the circuit being made at least partially inoperable if the security module receives at least one of the said security signal(s) with a predetermined value. Such a circuit comprises means for encoding the security signal using a dynamic key, receiving a static security signal and outputting a dynamic security signal, and means to transmit the dynamic key or at least one item of information representative of the dynamic key to the security module.
Claims22
An integrated circuit comprising:
- at least one security module, controlled by at least one security signal, the said circuit being made at least partially inoperable if the security module receives at least one of the said security signal(s) with a predetermined value;
- means of encoding the said security signal using a dynamic key, receiving a static security signal and outputting a dynamic security signal;
- and
- means of transmitting the said dynamic key or at least one item of information representative of the said dynamic key, to the security module.
A security process for an integrated circuit comprising at least one security module, comprising:
- coding at least one security signal using a dynamic key;
- transmitting the dynamic key or at least one item of information representative of the said dynamic key to the said security module;
- controlling the said security module by the said at least one security signal;
- and
- making the integrated circuit at least partially non-operable if the said security module receives at least one of the said security signal(s) with a predetermined value.
A security device for an integrated circuit, the said device comprising:
- at least one security module, controlled by at least one security signal, the said circuit being made at least partially inoperable if the said security module receives at least one of the said security signal(s) with a predetermined value;
- means of encoding the said security signal using a dynamic key, receiving a static security signal and outputting a dynamic security signal;
- and
- means of transmitting the said dynamic key or at least one item of information representative of the said dynamic key, to the said security module.
A security signal for an integrated circuit controlling at least a security module of the said circuit, the said circuit being made at least partially non-operable if the said security module receives the said security signal with a predetermined value, wherein the security signal is coded using a dynamic key, and the said dynamic key or at least one item of information representative of the said dynamic key is transmitted to the said security module.
Dependencies are inferred from the claim text.