Memory card
US6999948B1 · kind B1 · utility
28Cited by
1References
10Claims
0Family size
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Key dates
| Filing date | Aug 9, 2000 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Mar 15, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2463/103
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A memory card 110 extracts a session key Ks from the data applied onto a data bus BS3 by carrying out a decryption process. An encryption processing unit 1406 encrypts a public encryption key KPcard(1) of memory card 110 based on session key Ks, and applies the encrypted key to a server via data bus BS3. A memory 1412 receives from a server data such as license key Kc, license ID data License-ID and user ID data User-ID encrypted with a public encryption key KPcard(1) differing for each memory card for storage, and receives encrypted content data [Dc]Kc encrypted with license key Kc from data bus BS3 for storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.