发明名称 |
Data transfer control device, electronic instrument, and data transfer control method |
摘要 |
Data to be transferred from a BUS 1 (IEEE 1394 or USB) is encrypted by a second encryption process (DES) and the encrypted data is written to an external SDRAM through an external terminal of a data transfer control device. The encrypted data that has been written to the SDRAM is read through the external terminal, and the thus-read encrypted data is transferred to a BUS 2 to which an HDD is connected. Encrypted data transferred from the BUS 1 is decrypted by a first decryption process (DTCP), and is written to a small-capacity SRAM within the data transfer control device. The thus-written decrypted data is read from the SRAM and encrypted by the second encryption process. Paths that bypass the second encryption (or decryption) are also provided.
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申请公布号 |
US7219238(B2) |
申请公布日期 |
2007.05.15 |
申请号 |
US20030379910 |
申请日期 |
2003.03.06 |
申请人 |
SEIKO EPSON CORPORATION |
发明人 |
SAITO NOBUYUKI;OKA YOSHIMI |
分类号 |
G06F13/12;H04L9/00;G06F11/30;G06F12/14;G06F13/28;G06F15/16;G06F21/00;H04L9/32;H04N5/00;H04N5/44;H04N5/765;H04N5/91;H04N5/92;H04N7/08;H04N7/081;H04N7/167 |
主分类号 |
G06F13/12 |
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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