A verification device pre-stores content-derived values and a device-specific cryptographic key to enable offline validation of captured content authenticity.

Patentradars sammanfattning

Ericsson's PCT application describes a method performed by a verification device to enable downstream validation of content produced by a content capturing device (e.g., a camera). The verification device pre-computes and stores content-derived values keyed to a set of content parameters, then derives a cryptographic key from device-specific data combined with key-generation data, which is also provisioned to the capturing device. Because the key and content-derived values are stored on the verification device independently, validation can occur without any live communication with the capturing device, supporting offline or asynchronous integrity checking.

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