System and method for backing-up data stored on a portable audio player
US6577735B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1999 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Jun 8, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2220/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system creates an encrypted backup copy of the compressed audio data downloaded onto a portable audio player. When a user loads a portable audio player with audio data from a CD inserted into a computer's CD-ROM drive, the system creates an encrypted copy of the compressed audio data and stores the encrypted copy on the computer's hard disk. The encrypted copy cannot be used without a cryptographic key, but the system discards the cryptographic key once the encrypted copy of the audio data is stored. To extract usable audio data from the encrypted backup copy, it is necessary to re-insert the original CD and regenerate the cryptographic key. Once the cryptographic key is regenerated, the encrypted audio data can be decrypted and re-loaded onto the portable audio player.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.