Streamcipher information redundant in next packet of encrypted frame
A stream encryption, encryption key technology, applied in secure communication, synchronous send/receive encryption equipment, encryption device with shift register/memory, etc., can solve problems such as reducing content quality
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[0013] figure 1 The encryption format used in the present invention is explained. The top row relates to user information such as audio or video, and consists of a frame 20, which includes a frame header FH and a frame payload FP. This frame sequence does not need to have a consistent amount of payload data, but its size will depend on the degree of information compression applied. In addition, for the displayed frame structure, the format may include an application-related sub-frame format. The sub-frame format is not further shown in the figure, but there is no noteworthy division in the further encryption / decryption process considered below. In this case, a further frame division (dividing of the frame) can be formed from various sub-frames. These subframes may involve another information structure related to the application related to the transmitted payload.
[0014] In the second row, the frame 20 is mapped onto a sequence 22 of three transport packets, and this number is ...
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