【摘要】 在电子公文的传输与管理中,电子印章常被用来保障电子公文完整性与真实性,实现签署人身份认证。在研究传统电子印章设计原则和关键技术的基础上,重点分析其用作单位公章时存在的安全缺陷。基于群签名技术和双重数字水印设计安全可靠的电子公章方案,并讨论其安全性。更多还原

【Abstract】 In the transmission and management of electronic documents,electronic seal is always used for protecting the integrality and authenticity of the document’s content and realizing the entity authentication.Based on the research of design principles and key technologies of traditional electronic seal,the security deficiency is detailedly analyzed when used as common seal.A security electronic common seal scheme is brought up with the combination of the group signature and doubles digital watermarking.A security analysis of the scheme is made at the last.更多还原