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Fix cw.tex
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Andre Henriques 2023-11-03 16:53:22 +00:00
parent a71a69000a
commit b5b4abc98d
1 changed files with 6 additions and 1 deletions
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cw/cw.tex
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@ -145,7 +145,12 @@
$$ $$
$$v=77(137,312) + 93(215,-187)=(30544, 6633)$$ $$v=77(137,312) + 93(215,-187)=(30544, 6633)$$
$$r=v-w=(4, 9)$$ $$r=w-v=(4, 9)$$
\subsection*{7.2}
No he should not.
If r is not changed then we could submit to the oracle (1,0) and (2,0) and if the oracle gives us 2 cipher texts that are the same then we know that b = 1 and if they are different then we know its b=0 therefore not changing the r is not secure.