发明名称 |
Security unit for use in memory card |
摘要 |
A security unit to prevent unauthorized retrieval of data includes an encrypting unit for encrypting data in accordance with commands received by the security unit, and a common register for storing both intermediate results and final results of the data encryption. A switching element operatively coupled to the register selectively outputs the contents of the register. The switching element is controlled to prevent external access to the intermediate results of the encryption. The security unit is particularly useful as part of a memory unit that is attachable to a recording/reproduction device such as a digital audio recorder/player.
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申请公布号 |
US7124436(B2) |
申请公布日期 |
2006.10.17 |
申请号 |
US20040972969 |
申请日期 |
2004.10.25 |
申请人 |
SONY CORPORATION |
发明人 |
OKAUE TAKUMI;ISHIBASHI YOSHIHITO;SAKAMOTO YUKIHIRO;MIZUNO ASAMI;KIHARA NOBUYUKI;YOKOTA TEPPEI |
分类号 |
G06F12/14;H04L9/22;G06F1/00;G06F11/00;G06F17/30;G06F21/00;G06F21/10;G06F21/31;G06F21/44;G06F21/60;G06F21/72;G06F21/78;G06F21/79;G11B20/00;G11B20/10;G11C16/20;G11C16/22;H04K1/00 |
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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