中国邮电高校学报(英文) ›› 2007, Vol. 14 ›› Issue (4): 57-63.doi: 1005-8885 (2007) 04-0057-07

• Artificial Intelligence • 上一篇    下一篇

How to signcrypt a message to designated group

马春波;敖珺;李建华   

  1. School of Information Security Engineering, Shanghai Jiao Tong University
  • 收稿日期:2007-02-13 修回日期:1900-01-01 出版日期:2007-12-24
  • 通讯作者: 马春波

How to signcrypt a message to designated group

MA Chun-bo; AO Jun; LI Jian-hua   

  1. School of Information Security Engineering, Shanghai Jiao Tong University
  • Received:2007-02-13 Revised:1900-01-01 Online:2007-12-24
  • Contact: MA Chun-bo

摘要:

In an open network environment, the protection of group communication is a crucial problem. In this article, a novel broadcast group-oriented signcryption scheme is presented for group communication scenarios in distributed networks. Anyone in this scheme can signcrypt a message and distribute it to a designated group, and any member in the receiving group can unsigncrypt the ciphertext. The ciphertext and public key in the scheme are of constant size. In addition, this new scheme offers public verification of the ciphertext. This property is very important to the large-scale group communication since the gateway can filter the incorrect ciphertext and alleviate the receiver’s workload. Finally, a proof in the random oracle model is given to show that the scheme is secure against chosen ciphertext attack and existential forgery.

关键词:

broadcast; signcryption; designated group; chosen ciphertext attack; existential forgery; random oracle model

Abstract:

In an open network environment, the protection of group communication is a crucial problem. In this article, a novel broadcast group-oriented signcryption scheme is presented for group communication scenarios in distributed networks. Anyone in this scheme can signcrypt a message and distribute it to a designated group, and any member in the receiving group can unsigncrypt the ciphertext. The ciphertext and public key in the scheme are of constant size. In addition, this new scheme offers public verification of the ciphertext. This property is very important to the large-scale group communication since the gateway can filter the incorrect ciphertext and alleviate the receiver’s workload. Finally, a proof in the random oracle model is given to show that the scheme is secure against chosen ciphertext attack and existential forgery.

Key words:

broadcast; signcryption; designated group; chosen ciphertext attack; existential forgery; random oracle model