Cryptography Basics – (Pseudo)Randomness ECEN 4133 Jan 21, 2021 Review •Integrity of messages between Alice and Bob •Alice appends bits that only Alice (and Bob)…
Cryptography Basics – Public Key Cryptography ECEN 4133 FEB 4, 2021 Shared key limitations Suppose Alice publishes data to lots of people, and they all…
Cryptography Basics – Block ciphers and modes ECEN 4133 Jan 26, 2021 Alternative to stream cipher: Block Ciphers Today’s most common block cipher: AES (Advanced…
Public-Key Crypto Review: Integrity Problem: Sending a message over an untrusted channel without being changed Provably-secure solution: Random function Practical solution: m, v := fk(m)…
Web Security SQL Injection, CSRF, XSS ECEN 4133 Feb 11, 2021 Web Review | HTTP GET / HTTP/1.1 Host: gmail.com HTTP/1.1 200 OK … http://gmail.com/…
Web Security SQL Injection, CSRF, XSS ECEN 4133 Feb 11, 2021 Web Review | HTTP GET / HTTP/1.1 Host: gmail.com HTTP/1.1 200 OK … http://gmail.com/…
Web Security 1 Today • Web architecture – Basics of web security 2 What is the Web? • A platform for deploying applications, portably and…
Public-Key Crypto Review: Integrity Problem: Sending a message over an untrusted channel without being changed Provably-secure solution: Random function Practical solution: m, v := fk(m)…
Cryptography Basics – (Pseudo)Randomness ECEN 4133 Jan 21, 2021 Review •Integrity of messages between Alice and Bob •Alice appends bits that only Alice (and Bob)…
Intuition (using inequalities): (a) backed up values: Remember that root node is max (see text of the question). So value(A) is max(value(B), value(C), value(D)), and…