System and method for self-decaying digital media files and for validated playback of same
First Claim
1. A method for validating a current date from an information handling system, the method comprising:
- obtaining a current system date stored on the information handling system;
determining whether a current network date is available and obtaining the current network date if available;
identifying a file date from at least one file stored on the information handling system and obtaining the at least one file date;
wherein the file stored on the information handling system is an operating system swap file;
comparing the current system date, the current network date if available, and the at least one file date; and
validating the current system date as representing an actual current date if the current system date is equal to or within a predetermined number of days greater than the current network date if available and the at least one file date.
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Accused Products
Abstract
Information, such as audio visual information, is secured by self-decay of the information over time. For instance, a date stamp and decay rate embedded in an encrypted audio or visual digital media file can be applied to decrypt the file to a predetermined decayed state, such as a degraded playback quality. One or more keys can be included with the information to allow undecayed decryption but expire after use or a predetermined time period. In one embodiment, the decayed state can comprise gaps formed at intervals in the information, the gaps having increased length for decreased quality. In an alternative embodiment, the decayed state can be a reduced sample rate for a compressed digital media file.
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Citations
19 Claims
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1. A method for validating a current date from an information handling system, the method comprising:
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obtaining a current system date stored on the information handling system; determining whether a current network date is available and obtaining the current network date if available; identifying a file date from at least one file stored on the information handling system and obtaining the at least one file date; wherein the file stored on the information handling system is an operating system swap file; comparing the current system date, the current network date if available, and the at least one file date; and validating the current system date as representing an actual current date if the current system date is equal to or within a predetermined number of days greater than the current network date if available and the at least one file date. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method for validating playback of digital media files on a stand alone media player device, the method comprising:
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establishing a communication link between a media player device and a host information handling system; verifying that the host system has a validated current system date by comparing a current system date of the host system with an operating system swap file date of the host system; allowing, in response to the verifying, a file storage of the media player device to be available for reading or writing of digital media files; and storing the validated current system date on the media player device and associating the validated current date with digital media files stored on the media player device. - View Dependent Claims (13, 14, 15)
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16. A method for validating playback of digital media files on a stand alone media player device, the method comprising:
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verifying that a host system has a valid current system date by comparing a current system date of the host system with an operating system swap file date of the host system; and in response to the verifying, storing the valid current system date on the media player device and associating the valid current system date with digital media files stored on the stand alone media player device. - View Dependent Claims (17, 18, 19)
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Specification