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1/0 S1 1/0 0/0 S2 1/1 0/0 0/0 S3

1/0 S1 1/0 0/0 S2 1/1 0/0 0/0 S3

Programming with Microsoft Visual Basic 2017
Programming with Microsoft Visual Basic 2017
8th Edition
ISBN:9781337102124
Author:Diane Zak
Publisher:Diane Zak
Chapter4: The Selection Structure
Section: Chapter Questions
Problem 1MQ6
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Figure shows a finite state machine(FSM) description of a sequential digital circuit , which has one input(X) and one output(Y). The design has three valid states S1,S2 and S3.

Modify the FSM specification in figure to insert a malicious hardware Trojan .Derive logic implementation of the resulting circuit using D flip flops and bunary coding of the internal states. The inserted Trojan should not affect the original functionality but should allow the infected circut to detect an additional sequence of your choice.

Note:The Trojan you insert should not lead to an increase in the number of D flips  compared to the original design.

1/0 $1 1/0 0/0 S2 1/1 0/0 0/0 S3
Transcribed Image Text:1/0 $1 1/0 0/0 S2 1/1 0/0 0/0 S3
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