06898708 is referenced by 51 patents and cites 15 patents.

A cellular phone (100) stores encrypted content data and encrypted license key distributed thereto in a memory card (110). The cellular phone (100) and the memory card (110) collectively perform a part of mutual authentication processing upon power-on. The encrypted license key (Kc) read from the memory card (110) is decrypted by a first decryption processing portion (1510) with a session key (Ks4), and is further decrypted by a second decryption processing portion (1514) with a system symmetric key (Kcom) for extraction. A third encryption processing portion (1516) decrypts the encrypted content data read from memory card (110) with the license key (Kc) to reproduce content data (Data).

Title
Device for reproducing data
Application Number
10/148191
Publication Number
6898708 (B2)
Application Date
December 6, 2000
Publication Date
May 24, 2005
Inventor
Takeaki Anazawa
Tokyo
JP
Tadaaki Tonegawa
Kodaira
JP
Takahisa Hatakeyama
Kawasaki
JP
Takayuki Hasebe
Kawasaki
JP
Hiroshi Takemura
Aichi
JP
Takatoshi Yoshikawa
Ogaki
JP
Miwa Kanamori
Ogaki
JP
Toshiaki Hioki
Ogaki
JP
Yoshihiro Hori
Gifu
JP
Agent
Westerman Hattori Daniels & Adrian
Assignee
Fujitsu
JP
Sanyo Electric
JP
IPC
G06F 001/00
H04L 009/32
H04L 009/00
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