Method of copying and decrypting encrypted digital data and apparatus therefor
    1.
    发明申请
    Method of copying and decrypting encrypted digital data and apparatus therefor 有权
    复制和解密加密数字数据的方法及其装置

    公开(公告)号:US20050108560A1

    公开(公告)日:2005-05-19

    申请号:US10958237

    申请日:2004-10-06

    IPC分类号: G06F17/00 G06F12/14 G06F21/10

    摘要: A method of and an apparatus for copying and decrypting encrypted digital data. The method of copying encrypted digital data includes encrypting a first media key block to be used for decryption of the encrypted digital data using a predetermined key of a second information storage medium and storing the encrypted digital data and the encrypted first media key block in the second information storage medium. Security of data encryption is heightened by not discarding an encryption key used for an initial encryption, encrypting the encryption key used for initial encryption using another encryption key used for a second encryption, and storing the encrypted encryption key with the data. Also, since unnecessary decryption and encryption of data are not repeated, the time required for copying data is reduced, and since data is transferred between apparatuses in an encrypted state, a security level is higher.

    摘要翻译: 一种用于复制和解密加密的数字数据的方法和装置。 复制加密的数字数据的方法包括使用第二信息存储介质的预定密钥加密要用于解密加密的数字数据的第一媒体密钥块,并将加密的数字数据和加密的第一媒体密钥块存储在第二媒体密钥块中 信息存储介质。 通过不丢弃用于初始加密的加密密钥来加密数据加密的安全性,使用用于第二加密的另一加密密钥加密用于初始加密的加密密钥,并将加密的加密密钥与该数据进行存储。 此外,由于不重复数据的不必要的解密和加密,所以减少了复制数据所需的时间,并且由于数据在加密状态的装置之间传送,所以安全级别更高。