Smartcard-Based System for Multicast Content Protection and Payment
基于智能卡的组播内容保护与支付系统

Content protection is the key issue to perform digital content transactions on the web. It is impractical for commercial multicast assuming that all group members know the group key in traditional multicast key management schemes. The proposed design for multicast content protection and payment system is based on the secure smartcard assumption under which both attackers and card holder are not able to obtain the private key and group key stored in the smartcard. Identity-based encryption scheme is introduced in the system to avoid using public key certificates. The system can guarantee the secrecy of content transmission with other features like simplicity for identification, content authentication, key management and anonymity for payments.