METHOD FOR ALTERATION OF INTEGRITY PROTECTED DATA IN A DEVICE, COMPUTER PROGRAM PRODUCT AND DEVICE IMPLEMENTING THE METHOD
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Abstract
The invention relates to a method for enabling modifications of integrity protected data, such as SIM lock settings, in a device. The method comprises: in a device, creating a data entity containing signed change information about allowable alterations, the change information being bound to the device, a certificate with a public key corresponding to the private key used to sign the change information; accessing the device and requesting alteration; verifying the requested alteration against the data entity; and if the verification succeeds, performing the requested alteration. By centrally preparing dedicated replacement devices, which locally can be altered in a simple and secure way, without compromising sensitive information or data, a more secure handling of alteration is achieved. Also, the invention relates to a corresponding computer program product and a device implementing the method.
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Citations
43 Claims
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1-22. -22. (canceled)
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23. A method for alteration of integrity protected data in a device comprising:
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in the device, creating and storing a data entity containing signed change information about allowable alterations, the change information being bound to the device, a certificate with a public key corresponding to the private key used to sign the change information; accessing the device and requesting alteration; verifying the requested alteration against the data entity; and if the verification succeeds, performing the requested alteration. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37)
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- 38. A computer program product stored in a computer-readable medium and comprising a data entity containing signed change information about allowable alterations for alteration of integrity protected data in a device, the change information being bound to the device, and a certificate with a public key corresponding to the private key used to sign the change information.
Specification