一种新的基于身份数字签名方案

在现有的基于身份的签名方案中,签名者必须绝对信任密钥产生机构（PKG）。由于签名者用于签名的密钥是由PKG产生的,那么PKG就可以伪造签名者的签名。因此,在有些方案中,提出了引入多个PKG,如果能够确保至少一个PKG是诚实可信的,就可以确保方案的安全性。但是足够多的PKG还是能够伪造用户的签名,所以并没有从根本上解决这个问题。本文提出一个无需PKG诚实可信的一个签名方案,从根本上解决了密钥暴露的问题。

A New ID-based Group Signature Scheme

In those existing ID-based signature schemes,people need to trust Private Key Generator (PKG).PKGs can forge the signature because PKGs make the private key.In order to solve the problem,some papers proposed that many PKGs can be imported,if it is insured that at least one PKG is honest,the scheme is safe.But enough PKGs can also forge the signature,so the problem isn't solved fundamentally.This paper proposes a new ID-based signature scheme without honest PKGs.It solves the problem of key escrow.