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Learner Reviews & Feedback for Symmetric Cryptography by University of Colorado System

58 ratings
7 reviews

About the Course

Welcome to Symmetric Cryptography! Symmetric cryptography relies on shared secret key to ensure message confidentiality, so that the unauthorized attackers cannot retrieve the message. The course describes substitution and transposition techniques, which were the bases for classical cryptography when the message is encoded in natural language such as English. Then, we build on product ciphers (using both substitution and transposition/permutation) to describe modern block ciphers and review the widely used cipher algorithms in DES, 3-DES, and AES. Lastly, we enable the use of block ciphers to support variable data length by introducing different modes of block cipher operations in ECB, CBC, CFB, OFB, and CTR modes. This course is cross-listed and is a part of the two specializations, the Applied Cryptography specialization and the Introduction to Applied Cryptography specialization....
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1 - 7 of 7 Reviews for Symmetric Cryptography

By Mohamed T

Jun 19, 2018

Excellent course


Jan 18, 2018

Excellent course

By Georgios P

May 25, 2019

Great course presented in an simple way!

By Benedict J W

May 27, 2019


By Manuel A D R

Aug 01, 2019

excellent course

By M M S

Mar 31, 2018

Reviewing assignment is no one is there

By Ivon S S Q

May 23, 2019

is very difficult to understand.