Verification of signed video streams
First Claim
1. A method comprising:
- receiving user authenticating information for applying a digital signature stamp of a user to contents of an electronic video stream;
sampling a portion of the electronic video stream;
receiving a selection of a region defined by the user, the region overlapping at least some of the electronic video stream, for application of the digital signature stamp;
computing, by a computing system comprising computer hardware, a digital signature based on a key and contents of the portion of the electronic video stream; and
embedding within the electronic video stream, in association with the portion of the electronic video stream, the digital signature stamp comprising a graphical display of digits corresponding to the computed digital signature.
4 Assignments
0 Petitions
Accused Products
Abstract
Methods, apparatus, and systems are disclosed for, among other things, secure passphrase handling for computing devices. In one respect, a method is provided. The method includes receiving a plurality of passphrase elements from an input device. The method also includes performing a sequence of secure delay processing operations, each operation generating a delayed output value from an initial value. The passphrase is verified upon completion of the sequence of secure delay processing operations. Further, initial values of respective secure delay processing operations are based on respective passphrase elements and, for each secure delay processing operation after a first secure delay processing operation, a delayed output value from at least one other secure delay processing operations.
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Citations
20 Claims
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1. A method comprising:
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receiving user authenticating information for applying a digital signature stamp of a user to contents of an electronic video stream; sampling a portion of the electronic video stream; receiving a selection of a region defined by the user, the region overlapping at least some of the electronic video stream, for application of the digital signature stamp; computing, by a computing system comprising computer hardware, a digital signature based on a key and contents of the portion of the electronic video stream; and embedding within the electronic video stream, in association with the portion of the electronic video stream, the digital signature stamp comprising a graphical display of digits corresponding to the computed digital signature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A secure computing device comprising:
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a receiver configured to receive user authenticating information for applying a digital signature stamp of a user to contents of an electronic video stream; a memory storing machine readable instructions; and a processor configured to execute the machine readable instructions to cause the secure computing device to; sample a portion of the electronic video stream; receive a selection of a region defined by the user, the region overlapping at least some of the electronic video stream, for application of the digital signature stamp; compute a digital signature based on a key and contents of the portion of the electronic video stream; and embed within the electronic video stream, in association with the portion of the electronic video stream, the digital signature stamp comprising a graphical display of digits corresponding to the computed digital signature. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A non-transitory computer-readable storage medium including instructions executable by a processor of a secure computing device, the instructions causing the secure computing device to:
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receive user authenticating information for applying a digital signature stamp of a user to contents of an electronic video stream; sample a portion of the electronic video stream; receive a selection of a region defined by the user, the region overlapping at least some of the electronic video stream, for application of the digital signature stamp; compute a digital signature based on a key and contents of the portion of the electronic video stream; and embed within the electronic video stream, in association with the portion of the electronic video stream, the digital signature stamp comprising a graphical display of digits corresponding to the computed digital signature.
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Specification