Submitted on: 29 December 2004.
Revised on: 21 February 2005.
Accepted on: 08 April 2005.
___________________International Journal on Information Technologies and Security
Submitted on: 20 October 2012.
Revised on: 17 December 2012.
Accepted on: 07 February 2013.
___________________International Journal on Information Technologies and Security
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Submitted on: 10 April 2019.
Revised on: 05 June 2019.
Accepted on: 09 July 2019.
___________________International Journal on Information Technologies and Security
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