http://reply.papertrans.cn/2/163/16236/16236-31.png
Submitted on: 02 August 2004.
Revised on: 27 October 2004.
Accepted on: 15 November 2004.
___________________JOURNAL OF CRYPTOLOGY---SPRINGER
Submitted on: 14 February 2004.
Revised on: 25 April 2004.
Accepted on: 12 May 2004.
___________________JOURNAL OF CRYPTOLOGY---SPRINGER
http://reply.papertrans.cn/2/163/16236/16236-34.png
http://reply.papertrans.cn/2/163/16236/16236-35.png
http://reply.papertrans.cn/2/163/16236/16236-36.png