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Submitted on: 05 July 2011.
Revised on: 06 August 2011.
Accepted on: 18 September 2011.
___________________Groups Complexity Cryptology---EPISCIENCES
Submitted on: 23 March 2011.
Revised on: 14 April 2011.
Accepted on: 03 May 2011.
___________________Groups Complexity Cryptology---EPISCIENCES
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