发明名称 |
Device for reproducing data |
摘要 |
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).
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申请公布号 |
US2002183985(A1) |
申请公布日期 |
2002.12.05 |
申请号 |
US20020148191 |
申请日期 |
2002.06.06 |
申请人 |
HORI YOSHIHIRO;HIOKI TOSHIAKI;KANAMORI MIWA;YOSHIKAWA TAKATOSHI;TAKEMURA HIROSHI;HASEBE TAKAYUKI;HATAKEYAMA TAKAHISA;TONEGAWA TADAAKI;ANAZAWA TAKEAKI |
发明人 |
HORI YOSHIHIRO;HIOKI TOSHIAKI;KANAMORI MIWA;YOSHIKAWA TAKATOSHI;TAKEMURA HIROSHI;HASEBE TAKAYUKI;HATAKEYAMA TAKAHISA;TONEGAWA TADAAKI;ANAZAWA TAKEAKI |
分类号 |
G06F1/00;G06F21/00;G09C1/00;H04L9/08;H04L29/06;H04M1/725;(IPC1-7):G06F17/50 |
主分类号 |
G06F1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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