J4 ›› 2011, Vol. 38 ›› Issue (3): 140-144.doi: 10.3969/j.issn.1001-2400.2011.03.022

• 研究论文 • 上一篇    下一篇



  1. (1. 西安电子科技大学 理学院,陕西 西安  710071;
    2. 西安电子科技大学 计算机网络与信息安全教育部重点实验室,陕西 西安  710071)
  • 收稿日期:2010-05-18 出版日期:2011-06-20 发布日期:2011-07-14
  • 通讯作者: 张应辉
  • 作者简介:张应辉(1985-),男,西安电子科技大学博士研究生,E-mail: prrd2007@163.com.
  • 基金资助:


Free protocol for the subliminal channels in the Schnorr-type ordinal multi-signature schemes

ZHANG Yinghui 1,2;LI Hui2;MA Hua1   

  1. (1. School of Science, Xidian Univ., Xi'an   710071, China|
    2. Key Lab. of Computer Networks and Information Security, Ministry of Education, Xidian Univ., Xi'an   710071, China)
  • Received:2010-05-18 Online:2011-06-20 Published:2011-07-14
  • Contact: ZHANG Yinghui



关键词: 密码学, 数字签名, 阈下封闭协议, 通信安全, 信息隐藏


A new interactive subliminal-free protocol is designed. It is shown that the proposed protocol can completely close the subliminal channels by the whole substitution existing in the random parameters in the Schnorr-type ordinal multi-signature schemes. The new protocol is an interactive process between the signers and the warden, and it ensures that the signature authority of the signer is guaranteed. To sign a given message, it is necessary for the warden to cooperate with all signers. The security of the proposed protocol is based on both the discrete logarithm intractability assumption and the existence of collision-free hash functions. In computational complexity and communications cost, the proposed protocol is more efficient than the existing schemes.

Key words: cryptography, digital signature, subliminal-free protocol, communication security, information hiding


  • TN918