ProgrammingLaTeXHere is LaTeX package to draw easily and quickly differential paths such as the ones below. Version 0.1: Download here (sty+examples). Example of LaTeX code for the first picture of this page (four AES rounds):
\begin{tikzpicture}
\defineStateSize{4} \defineArrowLength{3} \defineXGap{0} \defineYGap{2} \defineStateIndex{1} \defineLinkRound{1} \initdiffpath %%%%%%%%%%%%%%%%%%%% round 1 \colorstate{ B... .... .... .... }{SB} \colorstate{ B... .... .... .... }{SR} \colorstate{ B... .... .... .... }{MC} \colorstate{ B... B... B... B... }{AK} \colorstate{ B... B... B... B... }{0} %%%%%%%%%%%%%%%%%%%% round 2 \colorstate{ B... B... B... B... }{SB} \colorstate{ B... B... B... B... }{SR} \colorstate{ B... ...B ..B. .B.. }{MC} \colorstate{ BBBB BBBB BBBB BBBB }{AK} \colorstate{ BBBB BBBB BBBB BBBB }{0} %%%%%%%%%%%%%%%%%%%% round 3 \colorstate{ BBBB BBBB BBBB BBBB }{SB} \colorstate{ BBBB BBBB BBBB BBBB }{SR} \colorstate{ BBBB BBBB BBBB BBBB }{MC} \colorstate{ B... .B.. ..B. ...B }{AK} \colorstate{ B... .B.. ..B. ...B }{0} %%%%%%%%%%%%%%%%%%%% round 4 \colorstate{ B... .B.. ..B. ...B }{SB} \colorstate{ B... .B.. ..B. ...B }{SR} \colorstate{ B... B... B... B... }{MC} \colorstate{ B... .... .... .... }{AK} \colorstate{ B... .... .... .... }{0} \end{tikzpicture}  
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