可证明安全的单向可变门限代理重签名方案

现有门限代理重签名方案的门限值基本是固定的,但实际应用中需要根据消息的重要程度灵活地变化门限值。为此,基于S_（uni）门限代理重签名方案,提出一种单向可变门限代理重签名方案。在每次进行重签名前,系统会动态设定门限值,每个代理将最初接收的部分子密钥进行重新计算,得到最新门限值下的重签名密钥及其对应的验证公钥,且系统只需提供受托者的公钥信息,避免了受托者承担安全风险。与现有单向可变重签名方案相比,该方案计算效率和安全性更高,签名长度更短。...

Full description

Saved in:
Bibliographic Details
Published in计算机工程 Vol. 42; no. 4; pp. 143 - 146
Main Author 徐海峰 洪璇
Format Journal Article
LanguageChinese
Published 上海师范大学信息与机电工程学院,上海,200234 2016
Subjects
单向性
可变门限
数字签名
重签名密钥
门限代理重签名
digital signature
数字签名
可变门限
重签名密钥
单向性
re-signature key
门限代理重签名
variable threshold
threshold proxy re-signature
unidirectionality
Online AccessGet full text
ISSN1000-3428
DOI10.3969/j.issn.1000-3428.2016.04.026

Cover

More Information
Summary:现有门限代理重签名方案的门限值基本是固定的,但实际应用中需要根据消息的重要程度灵活地变化门限值。为此,基于S_（uni）门限代理重签名方案,提出一种单向可变门限代理重签名方案。在每次进行重签名前,系统会动态设定门限值,每个代理将最初接收的部分子密钥进行重新计算,得到最新门限值下的重签名密钥及其对应的验证公钥,且系统只需提供受托者的公钥信息,避免了受托者承担安全风险。与现有单向可变重签名方案相比,该方案计算效率和安全性更高,签名长度更短。
Bibliography:XU Haifeng,HONG Xuan（College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai 200234, China）
digital signature ; variable threshold ; re-signature key ; threshold proxy re-signature ; unidirectionality
31-1289/TP
In most existing threshold proxy re-signature schemes, threshold value is essentially immutable. However, depending on the significance of re-signature message, the value should be changed dynamically in many practical applications. Based on proxy re-signature scheme Suai this paper designs a new threshold proxy re-signature scheme which is unidirectional and variable. The system sets the new value of threshold before each re-signature, each agent re-calculates originally received sub-key partially, then each proxy can generate corresponding re-signature sub-key and verification key non-interactively. In order to protect the trustee security and avoid risk, system provides the public key when generating re-signature key. Compared with other unidirectional and v
ISSN:1000-3428
DOI:10.3969/j.issn.1000-3428.2016.04.026