盲代理多重盲签名方案的研究

Blind Proxy and Blind Multi-Signature Scheme

针对同时具有盲代理签名和多重签名性质的方案提出一种阻碍合法代理签名生成的攻击方案。为了克服这种安全缺陷,设计出一种改进的盲代理多重盲签名方案。新方案克服了原方案中信息拥有者无法验证真假代理签名者的问题。结果表明,方案不仅克服原方案存在的缺陷,同时具有多重盲签名性,效率更高,且代理签名长度非常短。

An attack about obstructing the legitimate proxy signature generation was presented on two classes of blind proxy multisignature schemes which had the properties of blind proxy signature schemes and proxy multi-signature schemes.In order to overcome the security problem,an improved blind proxy and blind multi-signature scheme was proposed.The new scheme resolved the problem that the information owner could not verify identity of the proxy signer.Result was proved that new scheme not only overcame the problem of former scheme,but also had the property of blind multi-signature.The efficiency was more than others and the length of proxy signature was very shorter.