| 摘要 |
Embodiments of methods and systems for encrypting and decrypting with encryption attributes are presented. An encryption attribute contains information to identify one or more segments of a file to be encrypted. An encryption process encrypts those one or more segments to generate a partly encrypted file instead of encrypting the entire file. That is, the file includes some data that are encrypted and some data that are not. In one embodiment, at least three encryption keys are used such that the encryption attribute is encrypted with using a third key.
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