| 摘要 |
A transmitting apparatus 100 comprises an initialization vector generating unit 110 for generating an initialization vector, an encryption unit 120 for initializing a stream encryption module using the generated initialization vector and performing stream encryption on stream data using the initialized stream encryption module, an encryption packet generating unit 130 for generating an encryption packet containing encrypted stream-encrypted data, an initialization packet generating unit 140 for generating an initialization packet containing an initialization vector and time information indicating when a next initialization vector of the initialization vector will be sent, and a transmission unit 150 for transmitting the initialization packet and the encryption packet by broadcast/multicast.
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