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1.方案的选定条件所谓加密技术,是在收费广播中为实现仅向订有合同的用户传送节目的一种广播系统技术。在选定加密技术方案时,要考虑以下条件: (1) 隐匿性:作为收费广播所加密的图像和声音,要有充分的隐匿性。
1. The Conditions for the Selection of the Protocols The so-called encryption technology is a broadcast system technology for the delivery of programs to subscribers who have subscribed contracts only in pay-per-broadcast. The following conditions should be considered when selecting an encryption scheme: (1) Occult: Images and sounds encrypted as pay-TV broadcasts should be sufficiently occult.