Anti tamper encapsulation for an integrated circuit
OwnerOliver Kömmerling, Fritz Kommerlinginventors
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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.
Claims35
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.
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.
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.
Dependencies are inferred from the claim text.