Fix cw.tex

2023-11-03 16:53:22 +00:00 · 2023-11-03 16:53:22 +00:00 · b5b4abc98d
commit b5b4abc98d
parent a71a69000a
1 changed files with 6 additions and 1 deletions
--- a/cw/cw.tex
+++ b/cw/cw.tex
@ -145,7 +145,12 @@
 	$$	

 	$$v=77(137,312) + 93(215,-187)=(30544, 6633)$$
-	$$r=v-w=(4, 9)$$
+	$$r=w-v=(4, 9)$$
+
+
+	\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.