With the rapid development of computer multimedia,how to protect digital products from being copied,pirated and juggled has been an urgent problem in the information security field.

• 随着计算机多媒体技术的快速发展,如何保护数字产品不被复制、盗用、篡改已成为信息安全领域中亟待解决的问题,数字水印技术成为解决该问题的一种新方法。