通信学报

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高效的模糊属性基签密方案

杨晓元1,2,林志强1,韩益亮1,2   

  1. 1. 武警工程大学 电子技术系 武警部队密码与信息安全保密重点实验室,陕西 西安 710086; 2. 武警工程大学 电子技术系 网络与信息安全研究所,陕西 西安 710086
  • 出版日期:2013-08-25 发布日期:2013-12-16
  • 基金资助:
    国家自然科学基金资助项目(61272492, 61103231, 61103230);陕西省自然科学基础研究计划基金资助项目(2011JM8012)

Efficient fuzzy attribute-based signcryption scheme

  • Online:2013-08-25 Published:2013-12-16

摘要: 多用户通信是当今信息交互的主要模式,提高通信安全性与解决通信效率问题是当前研究的重点。属性基签密保证了多用户在通信中消息的机密性与完整性,并通过一步操作实现对多用户的消息发送,提高了签密的效率。利用密钥共享模型及双线性对,提出一种高效的模糊属性基签密方案,基于DMBDH与CDH问题证明了机密性与不可伪造性,同时还满足可公开验证性与短密文性。分析对比表明,签密与解签密的运算量仅为(n+3)e和ne+(n+4)p,远小于同类方案的运算量,实现了算法的高效性。

Abstract: Multi-user communication is the major model of present information exchange and to improve communication security and to solve the problem of communication efficiency is the key of present research. Attributed-based signcryption ensures the confidentiality and integrity of the information during communication and realizes the sending of information through one-step operation, thus improving the efficiency of signcryption. By using secret sharing model and bilinear pairs, an efficient fuzzy attribute-based signcryption scheme was presented, and based on DMBDH and CDH problem, the confidentiality and unforgeability of the scheme were proved. Meanwhile, it meets public verifiability and short ciphertext. Compared with other analysis, the amount of computation of signcryption and designcryption is only (n+3)e and ne+(n+4)p, far less than those of other similar schemes and this realizes the efficiency of computation.

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