In recent years , some new concepts of information security have been proposed , especially in the application of intellectual property right protection , copyright protection and tamper - proofing . information hiding and digital watermarking are new measures of digital media protection , which are processes of embedding hidden messages within digital media such as text , images , video and audio . the hidden messages could be copyright information , user distributor identification number , company logo , personal signature , control bits , or any information considered useful for a specific application 信息隐藏与数字水印技术就是一种新的数字媒体保护措施，它是将特定的信息（如版权信息、秘密消息等）嵌入到图像、语音、视频及文本文件等各种数字媒体中，以达到标识、注释及版权保护等目的，同时，这种信息对宿主媒体的影响不足以引起人们的注意且具有特定的恢复方法，此信息对非法接收者应该是不可见、不可察觉的。
