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    • 10. 发明授权
    • Circuit building device
    • 电路建筑装置
    • US08452985B2
    • 2013-05-28
    • US11886712
    • 2006-04-07
    • Natsume MatsuzakiToshihisa NakanoShinichi Marui
    • Natsume MatsuzakiToshihisa NakanoShinichi Marui
    • G06F11/30G06F12/14
    • H04L9/0891H04L2209/60
    • The present invention provides an apparatus for securely acquiring a circuit configuration information set corresponding to a new cryptosystem without increasing the number of reconfigurable circuits. A content playback apparatus includes an FPGA that is reconfigurable. The content playback apparatus stores a decryption circuit program that shows the structure of a decryption circuit that executes decryption in accordance with a prescribed cryptosystem. The FPGA is reconfigured in accordance with the program to configure the decryption circuit. The playback apparatus acquires, from outside, an encrypted file that has been generated by encrypting a file including a decryption circuit program corresponding to the new cryptosystem in accordance with the prescribed cryptosystem, and decrypts the encrypted file by the decryption circuit.
    • 本发明提供一种用于安全地获取与新密码系统对应的电路配置信息集的装置,而不增加可重构电路的数量。 内容播放装置包括可重新配置的FPGA。 内容重放装置存储解密电路程序,其显示根据规定的密码系统执行解密的解密电路的结构。 根据程序重新配置FPGA以配置解密电路。 回放装置从外部获取通过根据规定的密码系统加密包含与新密码系统相对应的解密电路程序的文件而生成的加密文件,并且通过解密电路解密加密文件。