发明名称 |
Processing method and apparatus for encrypted data transfer |
摘要 |
The present invention provides a data processing method and apparatus capable of shortening the processing time required when editing previously encrypted track data. An example of a transfer of audio track data between a portable player and a storage device is provided. The track data is comprised of one or more parts, each of which in turn is comprised of a series of data blocks. Each block of the track data is encrypted prior to transfer using a block key. The block keys are determined in such a manner that subsequent editing of the track data which results in redistribution of the parts does not require full decryption of the data.
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申请公布号 |
US6792539(B1) |
申请公布日期 |
2004.09.14 |
申请号 |
US20000524972 |
申请日期 |
2000.03.14 |
申请人 |
SONY CORPORATION |
发明人 |
OISHI TATEO;ISHIGURO RYUJI;OKAUE TAKUMI;KIHARA NOBUYUKI;YOKOTA TEPPEI |
分类号 |
G06F1/00;G06F17/30;G06F21/00;G06F21/10;G06F21/31;G06F21/44;G06F21/60;G06F21/62;G06F21/72;G06F21/78;G06F21/79;G11B20/00;G11B20/10;G11B27/026;G11C16/20;G11C16/22;(IPC1-7):G06F13/00 |
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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