机构地区: 华南理工大学电子与信息学院
出 处: 《科学技术与工程》 2006年第18期2849-2852,2857,共5页
摘 要: 针对数字电视有条件接收系统中的密钥分配,提出了一种基于椭圆曲线密码的分层访问控制密钥分配方案。该方案可使一个接收组有效地衍生其下属组的接收密钥,方便地实现了增/减接收组、增/减组关系和改变授权密钥等动态访问管理,且只需重新计算一些相关参数而无需改变其他密钥。 A key distribution scheme based on elliptic curve cryptography for Conditional Access System (CAS) in Digital TV broadcast is proposed. The proposed scheme ensures that a receive group can efficiently derive secret keys of its Successors. Dynamic access control problems, such as adding/deleting group, adding/ deleting relationships and changing secret keys, are easily solved only need to recompute some relevant parameters without altering others keys 1.