upate about and contact info

fixed some typo

pages/CSE442T/index.md

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+# CSE 442T
+
+## Course Description
+
+This course is an introduction to the theory of cryptography. Topics include:
+
+One-way functions, Pseudorandomness, Private-key cryptography, Public-key cryptography, Authentication, and etc.
+
+### Instructor:
+
+[Brian Garnett](bcgarnett@wustl.edu)
+
+Math Phd… Great!
+
+Proof based course and write proofs.
+
+CSE 433 for practical applications.
+
+### Office Hours:
+
+Right after class! 4-5 Mon, Urbaur Hall 227
+
+### Textbook:
+
+[A course in cryptography Lecture Notes](https://www.cs.cornell.edu/courses/cs4830/2010fa/lecnotes.pdf)
+
+### Comments:
+
+Most proofs are not hard to understand.
+
+Many definitions to remember. They are long and tedious. 
+
+For example, I have to read the book to understand the definition of "hybrid argument". It was given as follows:
+
+
+
+
+I'm having a hard time to recover them without reading the book.
+
+The lecturer's explanation is good but you'd better always pay attention in class or you'll having a hard time to catch up with the proof.
+