Distributed decryption of word-oriented stream ciphers

被引：0

作者：

Liu, Zhi-Gao ^{[1
,2
]}

Zhang, Fu-Tai ^{[1
]}

Xu, Qian ^{[1
]}

机构：

[1] School of Mathematics and Computer Science, Nanjing Normal University, Nanjing 210097, China

[2] College of Vocational Technology, Anhui University of Technology, Ma'anshan 243011, China

来源：

Dianzi Yu Xinxi Xuebao/Journal of Electronics and Information Technology | 2006年 / 28卷 / 07期

关键词：

Computer networks - Database systems;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The distributed decryption scheme for simple addition stream ciphers proposed by Magnus Oberg is analyzed. Its main disadvantages, i.e. the operations of encryption and decryption are implemented in different finite fields, and the orders of the two fields must be primes satisfying a certain relation, are pointed out. A new distributed decryption scheme for word-oriented stream ciphers is presented. Compared with Magnus Oberg's scheme, the proposed scheme has two main advantages. Firstly, in the new scheme, the encryption and decryption operations are implemented in the same finite field, and the size of the field is not required to be a prime. Secondly, the security and efficiency of the new scheme are greatly improved. For applications, the new scheme can be applied in the protection of data confidentiality in a database, distributed key management in Ad-hoc networks, etc.

引用

页码：1312 / 1216