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发明公开
CN103297809A 媒体内容加密解密方法、装置及系统 失效 - 权利终止

媒体内容加密解密方法、装置及系统
摘要：
本发明公开了一种媒体内容加密解密方法、装置及系统，涉及数据加密解密操作领域，能够满足以片段为单位进行加密解密操作的需要。本发明加密解密方法包括：在加密时以片段为单位对媒体内容进行加密，并将加密片段的加密密钥包含在为媒体内容片段增加的首部，和加密后的媒体内容片段一起分发出去；当解密端接收到由加密媒体内容片段和首部组成的受保护媒体内容片段的整体或片段的一部分的媒体内容后，分析并确定接收的媒体内容在对应受保护媒体内容片段中的位置，根据位置信息获取接收的媒体内容对应片段的解密密钥，根据解密密钥对接收的媒体内容的加密媒体内容片段进行解密。本发明实施例主要用于以片段为单位对媒体内容进行加密解密的过程中。
摘要（英）：

The invention discloses a method and device and system for encrypting and decrypting media content, and relates to the field of data encrypting and decrypting operation. The requirement for encrypting and decrypting operation with a segment as a unit can be met. The encrypting and decrypting method includes the steps that in the encrypting process, the media content is encrypted with the segment as the unit, an encryption key of the encrypted segment is stored in the head portion added for the media content segment, and the encryption key and the encrypted media content segment are sent out together. When a decryption end receives part of media content of the whole or segmental protected media content formed by the encrypted media content segment and the head portion, the position of the received media content in the corresponding protected media content segment is analyzed and determined, a decryption key of the corresponding received media content segment is obtained according to position information, and the encrypted media content segment of the received media content is decrypted according to the decryption key. The method and device and system for encrypting and decrypting the media content is mainly applied to encrypting and decrypting process of the media content with the segment as the unit.

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