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Submitted on: 13 December 2014.
Revised on: 23 March 2015.
Accepted on: 04 April 2015.
___________________IEEE Transactions on Dependable and Secure Computing
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Submitted on: 13 August 2009.
Revised on: 02 November 2009.
Accepted on: 12 November 2009.
___________________IEEE Transactions on Dependable and Secure Computing
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Submitted on: 29 April 1998.
Revised on: 13 June 1998.
Accepted on: 24 June 1998.
___________________IEEE Transactions on Dependable and Secure Computing
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