摘要： 通过对Chong Hee Kim方案的改进，提出了一种多频道的付费数字电视用户管理方案，用户可以分别订购不同的频道，即每个频道有不同的频道密钥，并各自对用户收费。该方案在用户端只须秘密存储一个密钥，就可以订制不同的频道，提供了撤消用户订购频道的功能，可以在需要时恢复用户订购的原频道。使用黑盒盗版追踪的方法，阻止了用户主动泄漏自己的私钥给他人。　

关键词: 付费数字电视, 广播加密, 盗版追踪, 秘密存储

Abstract: Based on Chong Hee Kim’s scheme, an improved pay-TV management scheme for multiple channels is presented. The scheme can be used for multiple channels, each of which has its own private key. Only one secret key shall be kept by each user regardless of the number of channels. Channel revocation can be easily done as well as re-subscription. A black box piracy tracing algorithm is used in the scheme to prevent customers from releasing their private keys.

Key words: pay-TV, broadcast encryption, traitor tracing, secure store

中图分类号: 

• TP393