已有前向安全数字签名方案无法保证数字签名的后向安全性。对Abdalla-Reyzin的前向安全数字签名方案进行了改进,将单向散列链嵌入到该方案的签名中,使该方案具有后向安全检测功能。改进后的方案不仅具有数字签名的前向安全性,而且同样具有后向安全性。 There is a forward-secure digital signature scheme that can not guarantee the backward security of digital signatures. Abdalla-Reyzin’s forward-secure digital signature scheme has been improved by embedding a one-way hash chain into the scheme’s signature, which makes the scheme possesses backward-oriented security detection function. The improved scheme not only has the forward security of digital signature, but also possesses the backward security.