Computer Engineering and Applications ›› 2017, Vol. 53 ›› Issue (5): 128-133.DOI: 10.3778/j.issn.1002-8331.1608-0460

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 Fuzzy attribute-based signcryption scheme with constant length ciphertext

LIU Jiajia, LIU Jianhua   

  1. Department of Electronic and Information Engineering, Institute of Aviation Engineering, Civil Aviation Flight University of China, Guanghan, Sichuan 618307, China
  • Online:2017-03-01 Published:2017-03-03



  1. 中国民航飞行学院 航空工程学院 电子与信息工程教研室,四川 广汉 618307

Abstract: Aiming at the problem of linear ciphertext increase of current fuzzy-attribute based signcryption schemes with attribute number, a fuzzy attribute based signcryption scheme with constant length ciphertext is proposed. This scheme is constructed based on Lagrange interpolation formula and bilinear pairings. Signcrypter can signcrypt a message and send the resulting ciphertext to a set of users who own a designated attributes set, and ensure the secure properties, such as confidentiality and unforgeability of the message. Compared with current similar fuzzy attribute-based schemes, this scheme requires less computation resources. The ciphertexts length is constant in the scheme. Thus, it has better efficiency.

Key words: attribute-based, signcryption, constant length, multi-users, bilinear pairings

摘要: 针对目前模糊属性基签密方案密文长度随属性个数线性增加的问题,提出了一个密文长度为常数的模糊属性基签密方案。该方案利用拉格朗日插值公式和双线性对进行构建。签密者可将一段消息签密后发送给具有指定属性集的多个用户,同时保证消息的机密性、不可伪造性等安全属性。和现有同类模糊属性基方案相比,该方案需要的运算量最少,并同时支持常数长度的密文,具有更好的效率。

关键词: 属性基, 签密, 常数长度, 多用户, 双线性对