Signal processing
First Claim
1. A method of processing signal data comprising an unencrypted portion and an encrypted portion, the method comprising:
- (i) receiving, at a receiver, the signal data;
(ii) processing a sample of the signal data to provide a processed signal sample comprising data relating to the encrypted portion of the signal data and data relating to the unencrypted portion of the signal data,(iii) comparing the unencrypted signal data with at least one reference signal to determine information comprising at least one of (i) the time at which the signal was sent from the source and (ii) the identity of the source;
(iv) requesting, based on the determined information, and from a source remote to the receiver, a set of encrypted reference signal samples;
(v) comparing, on a processing device remote to the receiver, the set of encrypted reference signal samples with the received encrypted signal data to identify any matching signal samples.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of processing signal data including an unencrypted portion and an encrypted portion, the method including: receiving, at a receiver, the signal data; processing a sample of the signal data to provide a processed signal sample including data relating to the encrypted portion of the signal data and data relating to the unencrypted portion of the signal data, comparing the unencrypted signal data with at least one reference signal to determine information including at least one of (i) the time at which the signal was sent from the source and (ii) the identity of the source; requesting, based on the determined information, and from a source remote to the receiver, a set of encrypted reference signal samples; comparing, on a processing device remote to the receiver, the set of encrypted reference signal samples with the received encrypted signal data to identify any matching signal samples.
9 Citations
20 Claims
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1. A method of processing signal data comprising an unencrypted portion and an encrypted portion, the method comprising:
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(i) receiving, at a receiver, the signal data; (ii) processing a sample of the signal data to provide a processed signal sample comprising data relating to the encrypted portion of the signal data and data relating to the unencrypted portion of the signal data, (iii) comparing the unencrypted signal data with at least one reference signal to determine information comprising at least one of (i) the time at which the signal was sent from the source and (ii) the identity of the source; (iv) requesting, based on the determined information, and from a source remote to the receiver, a set of encrypted reference signal samples; (v) comparing, on a processing device remote to the receiver, the set of encrypted reference signal samples with the received encrypted signal data to identify any matching signal samples. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. Apparatus for processing signal data comprising an unencrypted portion and an encrypted portion, the apparatus comprising at least one of each of the following:
- a receiver, a remote processing device and a security module, wherein;
(i) the security module comprises a reference signal generator arranged to generate a set of encrypted reference signal samples; (ii) the receiver is arranged to receive signal data and comprises processing circuitry arranged to process signal data to provide a processed signal sample comprising data relating to the encrypted portion of the signal data and data relating to the unencrypted portion of the signal data, and further comprises a transmitter for transmitting the processed signal sample to the remote processing device (iii) at least one of the remote processing device and the receiver comprises processing circuitry comprising a comparison module for comparing the signal data with reference signal samples, and arranged to compare received unencrypted signal data with at least one reference signal to determine information comprising at least at least one of (i) the time at which signal data was sent from the source and (ii) the identity of a signal data source; (iv) the remote processing device comprises communication apparatus arranged to request generation of encrypted reference signal samples; (v) the reference signal generator of the security module generates, based on the request, a set of encrypted reference signal samples; (vi) at least one of the security module and the remote processing device comprises a comparison module arranged to compare the set of encrypted reference signal samples with the received encrypted signal data to identify any matching signal samples. - View Dependent Claims (15, 16, 17, 18, 19, 20)
- a receiver, a remote processing device and a security module, wherein;
Specification