Data reproduction apparatus and data reproduction module
US7203312B1 · kind B1 · utility
17Cited by
6References
41Claims
0Family size
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Inventors
Key dates
| Filing date | Aug 29, 2000 |
| Grant date | Apr 10, 2007 |
| Priority date | — |
| Expiry date | Dec 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/724
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A cellular phone has distributed encrypted content data and an encrypted content key stored in a memory. The encrypted content key data read out from the memory is decrypted by a decryption processing unit using key data Kp stored in a Kp hold unit, and then applied to a audio reproduction module. A decryption processing unit decrypts encrypted content data read out from the memory using a content key Kc extracted by the decryption processing unit to reproduce content data Dc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.