本文探讨了当前电子商务支付中电子支票的安全问题,分析了其发展的形势及存在的安全缺陷,提出了一种结合数字水印和数字签名的安全保障机制。该方案使得电子支票具有认证精度高、可信度高、安全性强等特点。 This paper explores the security of e-check in e-commerce payment, analyzes its development situation and existing security flaws, and proposes a security assurance mechanism combining digital watermarking and digital signature. The program makes the electronic check with high certification accuracy, high credibility, security and so on.