关键词: 电子文档, 信息标识, 数字水印, 数字指纹, 信息保护

Abstract: A generally suitable framework for watermarking application was proposed based on hierarchy, which was not only suitable for e-documents identity but also suitable for other kinds of digital watermarking applications. It was composed of three layers: driver layer, adapter layer and application layer. Then based on the techniques of layered watermarking, a scheme of e-documents identity was proposed based on digital watermarking technique. Also, the identity formats of confidential e-documents and the way to use it were discussed.

Key words: e-documents, information identity, digital watermarking, digital fingerprinting, information protection