Basic Cryptography and Programming with Crypto API

This Specialization covers the fundamentals of web development with Ruby on Rails. You'll learn everything you need to develop your own web application using Ruby on Rails, SQL and NoSQL databases, and HTML/CSS, and Javascript. We will also touch on advanced topics such as security, services using HTTP/RESTful access patterns, and user access and user experience from multiple device platforms. In the final Capstone Project, you'll apply your skills to develop a web application that hosts uploaded photos and displays them using a map.

( 4 Reviews )

Created by: Edward Chow

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Overall Score : 100 / 100

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Course Description

In this MOOC, we will learn the basic concepts and principles of crytography, apply basic cryptoanalysis to decrypt messages encrypted with mono-alphabetic substitution cipher, and discuss the strongest encryption technique of the one-time-pad and related quantum key distribution systems. We will also learn the efficient symmetric key cryptography algorithms for encrypting data, discuss the DES and AES standards, study the criteria for selecting AES standard, present the block cipher operating modes and discuss how they can prevent and detect the block swapping attacks, and examine how to defend against replay attacks. We will learn the Diffie-Hellman Symmetric Key Exchange Protocol to generate a symmetric key for two parties to communicate over insecure channel. We will learn the modular arithmetic and the Euler Totient Theorem to appreciate the RSA Asymmetric Crypto Algorithm, and use OpenSSL utility to realize the basic operations of RSA Crypto Algorithm. Armed with these knowledge, we learn how to use PHP Crypto API to write secure programs for encrypting and decrypting documents and for signing and verify documents. We then apply these techniques to enhance the registration process of a web site which ensures the account created is actually requested by the owner of the email account.

Time: 9h

Instructor Details

Edward Chow

5.0 Rating
4 Reviews

Dr. Chinghua Edward Chow is Professor of Computer Science. Got his PhD in Computer Science Degree from University of Texas at Austin 1985. He served as a Member of Technical Staff with Bell Communications Research, NJ 1986-1991. He joined UCCS 1991. His research is focused on the improvement of the security, reliability and performance of network systems. He has two US patents on distributed network restoration and survivable architecture. He is currently working on techniques and risk analysis for critical infrastructure protection and data protection using proximity and network information. He recently developed an efficient Internet Security protocol that improves the performance and security of online storage systems. A secure information sharing system was developed for setting up secure information infrastructure which is based on attribute certificate to coordinate multiple agencies task forces. By enhancing Laban dance notation, deploying computer animation, and developing wireless sensor based human motion tracking system, he is developing systems for improving assistive technologies and rehab patient care. He is currently working on techniques based on Software Defined Networks (SDN) for defending Distributed Denial of Services and improving cyber resilience, and techniques for enhancing data security through right path right place data delivery (R2D2).