The embodiment of the present invention discloses a method, device and system for transmitting data, which belongs to the field of Internet technology. The method includes: the intermediate device receives the first data transmission message with the first data transmitted by the first device, in which the first data is the target data encrypted by the first encryption key; the intermediate device decrypts the first data based on the first decryption key negotiated between the intermediate device and the first device, and obtains the target data. The intermediate device encrypts the processed target data based on the second encryption key negotiated between the intermediate device and the second device, and obtains the second data; the intermediate device transmits the second data transmission message carrying the second data to the second device. By adopting the invention, the intermediate equipment can work normally.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请，说明书已公开。
【技术保护点】
PCT国内申请，权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请，...
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