Anti tamper encapsulation for an integrated circuit
First Claim
Patent Images
1. An integrated circuit device comprising:
- a circuit which uses encryption; and
a protective member which reduces access to the circuit;
characterised in that the circuit is responsive to at least one physical parameter of the protective member to apply the encryption and/or decryption, so that tampering with the protective member to gain access to the circuit alters the encryption and/or decryption.
3 Assignments
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Accused Products
Abstract
An integrated circuit device comprising: a circuit which uses encryption; and an encapsulation packaging layer; in which the circuit is responsive to at least one physical parameter of the encapsulation to apply the encryption and/or decryption by reading the key therefrom, so that tampering with the encapsulation to gain access to the circuit causes the encryption and/or decryption to fail.
191 Citations
35 Claims
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1. An integrated circuit device comprising:
- a circuit which uses encryption; and
a protective member which reduces access to the circuit;
characterised in that the circuit is responsive to at least one physical parameter of the protective member to apply the encryption and/or decryption, so that tampering with the protective member to gain access to the circuit alters the encryption and/or decryption. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
- a circuit which uses encryption; and
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34. An integrated circuit device comprising a memory in which data is stored in encrypted form, and a circuit for applying encryption and/or decryption to write and/or read the data, the circuit comprising a key register storing a key for use in said encryption and/or decryption, and an alternation circuit arranged to vary the data stored in the key register at frequent intervals.
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35. A method of accessing encrypted data stored in a memory device, comprising deriving encryption data from a protective member which blocks access to the circuit, and using said encryption data to access said encrypted data.
Specification