Data processing: financial – business practice – management – or co – Business processing using cryptography – Secure transaction
Reexamination Certificate
2005-11-01
2010-06-29
Worjloh, Jalatee (Department: 3685)
Data processing: financial, business practice, management, or co
Business processing using cryptography
Secure transaction
C705S065000, C705S071000, C705S076000, C713S161000, C380S277000
Reexamination Certificate
active
07747538
ABSTRACT:
A memory card110extracts a session key Ks from the data applied onto a data bus BS3by carrying out a decryption process. An encryption processing unit1406encrypts a public encryption key KPcard(1) of memory card110based on session key Ks, and applies the encrypted key to a server via data bus BS3. A memory1412receives 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 BS3for storage.
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Anazawa Takeaki
Furuta Shigeki
Hasebe Takayuki
Hatakeyama Takahisa
Hatanaka Masayuki
Fujitsu Limited
Renesas Technology Corp.
Sanyo Electric Co,. Ltd.
Westerman Hattori Daniels & Adrian LLP
Worjloh Jalatee
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