Integrated circuit and smart card comprising such a circuit
First Claim
1. An integrated circuit comprising a first processing unit and a non-volatile memory for storing a key, said first processing unit being arranged to carry out a cryptographic algorithm using said stored key, wherein said non-volatile memory comprises at least two non-volatile memory elements, each memory element storing a share of a key used in the cryptographic algorithm, wherein each memory element is connected to the first processing unit by an independent bus.
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Accused Products
Abstract
An integrated circuit comprises a first processing unit and a non-volatile memory for storing a key. The first processing unit is arranged to carry out a cryptographic algorithm using the stored key. The non-volatile memory comprises at least two non-volatile memory elements, each memory element storing a share of a key used in the cryptographic algorithm. Each memory element is connected to the first processing unit by an independent bus.
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Citations
3 Claims
- 1. An integrated circuit comprising a first processing unit and a non-volatile memory for storing a key, said first processing unit being arranged to carry out a cryptographic algorithm using said stored key, wherein said non-volatile memory comprises at least two non-volatile memory elements, each memory element storing a share of a key used in the cryptographic algorithm, wherein each memory element is connected to the first processing unit by an independent bus.
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2. A method for carrying out a cryptographic algorithm using a key, wherein first and second shares of the key are stored in non-volatile memory elements, the first and second key shares are provided to a first processing unit through independent busses and the key shares are combined in said processing unit to carry out the cryptographic algorithm.
Specification