| 摘要 |
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. |
| 主权项 |
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. |
