中文摘要：

在应用层多播的框架之下结合已有多播水印协议的特点，提出一个适用于应用层多播的多播水印协议PALMWP、PALMWP协议属于位置相关协议，有着此类协议的优点，如部署简单、扩展性较好等、在协议设计中，加进了LDPC码等设计要素，使它在版权保护、盗版源跟踪及泄密者识别方面能发挥较好的作用．最后使用BAN逻辑对协议的认证环节进行了演绎分析、

英文摘要：

A multicast watermarking protocol（PALMWP）, based on application layer multicast is presented. The protocol is location dependent protocol, so it has the same advantages as other location dependent protocol, such as easier deployment, better scalability. Furthermore, LDPC code is used as a design element to enhance the capability of copyright protection, traitor tracing and leaker identification. Finally, BAN logic is used to deduct the authentication part of the PALMWP.