发明名称 |
CONTENT SALES PERIOD VERIFYING SYSTEM AND CONTENT DECRYPTION KEY EFFECTIVE PERIOD VERIFYING SYSTEM |
摘要 |
A CD-ROM is recorded with a CD-ROM effective period and an effective period of a content stored in the CD-ROM. A CD-ROM effective period judging section of a personal computer reads the effective periods, compares these periods with a machine date generated by a machine date generating section and enables a purchase slip transmitting section to transmit a purchase slip only when the machine data falls within the effective periods. A CD-ROM effective period judging section of a center compares the present date with the CD-ROM effective period and the content effective period registered on a goods master, reads the key from the goods master and transmits the key to the personal computer only when both of a CD-ROM number and a content ID written onto the received purchase slip fall within the effective periods. |
申请公布号 |
US2005071272(A1) |
申请公布日期 |
2005.03.31 |
申请号 |
US19960645073 |
申请日期 |
1996.05.13 |
申请人 |
YOSHIOKA MAKOTO;TSUNODA HARUHIKO;HASEGAWA KAZUHARU;AOE HIDEFUMI |
发明人 |
YOSHIOKA MAKOTO;TSUNODA HARUHIKO;HASEGAWA KAZUHARU;AOE HIDEFUMI |
分类号 |
G06F12/14;G06F21/00;G06F21/10;G06F21/24;G06F21/62;G06Q10/00;G06Q20/00;G06Q20/12;G06Q30/06;G06Q50/00;G06Q50/10;G11B20/10;(IPC1-7):G06F17/60 |
主分类号 |
G06F12/14 |
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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