METHOD FOR CRYPTOGRAPHICALLY VERIFIABLE IDENTIFICATION OF A PHYSICAL UNIT IN A PUBLIC, WIRELESS TELECOMMUNICATIONS NETWORK
First Claim
1. A mobile telephone for use in an open, wireless telecommunications network, comprising:
- a non-volatile memory;
an identity module configured to;
store a mobile phone secret identity and store a mobile phone open identity in the non-volatile memory in the mobile telephone, the mobile phone secret identity being an encryption of the mobile phone open identity;
receive an identity request with a first parameter from a testing device;
generate an electronic signature by means of a first cryptographic function from the secret identity and at least the first parameter in the mobile telephone, and send the generated electronic signature and the open identity to the testing device;
wherein the secret identity is such that the open identity of the mobile telephone is confirmed if the electronic signature matches a corresponding electronic signature generated by the testing device by application of a the first cryptographic function to the secret identity.
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Accused Products
Abstract
A method for identification of a physical unit (M) storing a secret identity (SIMEI) and an open identity (IMEI) in memory in a physical unit (M); generating a first parameter (CHv) in the testing device (P); sending an identity request (IR) with the first parameter (CHv) from the testing device (P) to the physical unit (M); generating an electronic signature (SIGt) by means of a first cryptographic function (F3) from the secret identity (SIMEI) and at least the first parameter (CHv) in the physical unit (M), and sending SIGt and the open identity (IMEI) to the testing device (P); and identifying the physical unit (M) by a comparison of the electronic signature (SIGt) sent and a corresponding electronic signature (SIGv) in the generated testing device (P).
14 Citations
9 Claims
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1. A mobile telephone for use in an open, wireless telecommunications network, comprising:
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a non-volatile memory; an identity module configured to; store a mobile phone secret identity and store a mobile phone open identity in the non-volatile memory in the mobile telephone, the mobile phone secret identity being an encryption of the mobile phone open identity; receive an identity request with a first parameter from a testing device; generate an electronic signature by means of a first cryptographic function from the secret identity and at least the first parameter in the mobile telephone, and send the generated electronic signature and the open identity to the testing device; wherein the secret identity is such that the open identity of the mobile telephone is confirmed if the electronic signature matches a corresponding electronic signature generated by the testing device by application of a the first cryptographic function to the secret identity. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A physical unit (M) for use in an open, wireless telecommunications network, the physical unit being configured to:
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store a secret identity (SIMEI) and an open identity (IMEI) in a memory in the physical unit (M); receive an identity request (IR) with the first parameter (CHv) from a testing device (P) at the physical unit (M); generate an electronic signature (SIGt) by means of a first cryptographic function (F1) from the secret identity (SIMEI) and at least the first parameter (CHv) in the physical unit (M), and send the generated electronic signature (SIGt) and the open identity (IMEI) to the testing device (P), so that the testing device may identify the physical unit (M) by a comparison of the electronic signature (SIGt) sent and a corresponding electronic signature (SIGv). - View Dependent Claims (8, 9)
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Specification