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| The mutual information between control and output sequences of the control-choice cryptographic logic |
| Liu Chuandong; Lǚ Shuwang; Fan Xiubin |
| State Key Lab. of Info. Security, Graduate School of USTC, Beijing 100039, China |
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Abstract This paper presents the probability model of the control-choice cryptographic logic. A necessery and sufficient condition is gained which satisfies that the mutual information is zero between control and output sequences of the control-choice cryptographic logic. By using the information leak between control and output sequences, a method of analysing the control-choice cryptographic logic is given.
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Received: 29 May 2002
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2003, Vol. 25 
