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cw/cw.tex
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cw/cw.tex
@ -144,9 +144,21 @@
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\end{cases}
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$$
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$$v=77(137,312) + 93(215,-187)=(30544, 6633)$$
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$$r=w-v=(4, 9)$$
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$$v'=77(137,312) + 93(215,-187)=(30544, 6633)$$
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$$r=w-v'=(4, 9)$$
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$$
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w = v'\times m + r\iff
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m= (30544, 6633)\times\begin{pmatrix}
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1975 & 438\\
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7548 & 1627\\
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\end{pmatrix}^-1}\iff
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m=(4,3)
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$$
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The plaintext is $(4, 3)$ and the $r=(4,9)$
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C:
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\subsection*{7.2}
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No he should not.
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