fix typo

pages/CSE442T/CSE442T_L11.md

@@ -45,7 +45,7 @@ Let $\{X_n\}_n$ and $\{Y_n\}_n$ be probability ensembles (separate of dist over
 $\{X_n\}_n$ and $\{Y_n\}_n$ are computationally **in-distinguishable** if for all non-uniform p.p.t adversary $D$ ("distinguishers")
 
 $$
-|P[x\gets X_n:D(x)=1]-P[y\gets Y_n:d(y)=1]|<\varepsilon(n)
+|P[x\gets X_n:D(x)=1]-P[y\gets Y_n:D(y)=1]|<\varepsilon(n)
 $$
 
 this basically means that the probability of finding any pattern in the two array is negligible.
@@ -53,7 +53,7 @@ this basically means that the probability of finding any pattern in the two arra
 If there is a $D$ such that
 
 $$
-|P[x\gets X_n:D(x)=1]-P[y\gets Y_n:d(y)=1]|\geq \mu(n)
+|P[x\gets X_n:D(x)=1]-P[y\gets Y_n:D(y)=1]|\geq \mu(n)
 $$
 
 then $D$ is distinguishing with probability $\mu(n)$
@@ -98,7 +98,7 @@ Example:
 
 Building distinguishers
 
-1. $X_n$: always outputs $0^n$, $D$: [outputs $1$ is $t=0^n$]  
+1. $X_n$: always outputs $0^n$, $D$: [outputs $1$ if $t=0^n$]  
     $$
     \vert P[t\gets X_n:D(t)=1]-P[t\gets U_n:D(t)=1]\vert=1-\frac{1}{2^n}\approx 1
     $$

pages/CSE442T/index.mdx

@@ -0,0 +1,10 @@
+# CSE 442T
+
+## Course Description
+
+This course is an introduction to the theory of cryptography. Topics include:
+
+One-way functions, trapdoor functions, and hash functions.
+
+Instructor:
+