Name: Symmetric Cryptography
Brand: University of Colorado System
Availability: OnlineOnly
Rating: 4.5 (53 reviews)

Back to Symmetric Cryptography

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

4.5

stars

275 ratings

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....

Top reviews

Nov 29, 2020

This course helps in clearing all the topics in which i have doubt. I have learned new concepts from this.

Aug 3, 2020

course design is brilliant. assignment questions are wonderful. peer review , flash quiz amazing.

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26 - 50 of 53 Reviews for Symmetric Cryptography

By Deji A

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Jul 30, 2021

very explanatory

By Manuel A D R

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Aug 1, 2019

excellent course

By Mohamed T

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Jun 19, 2018

Excellent course

By CHITTILLA V V

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Jan 18, 2018

Excellent course

By Kishan F

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Sep 18, 2020

Amazing course

By Bhut P

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Aug 30, 2020

rgergregew

By Benedict J W

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May 27, 2019

Brilliant!

By Mr.Arif M A

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May 18, 2020

Excellent

By Jedidah U

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Oct 8, 2025

Great

By Gantavya J

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Nov 17, 2022

GOOOD

By BHUVAN A

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Oct 5, 2021

good

By jong f

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Nov 17, 2020

good

By SANGEET D

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Sep 3, 2020

good

By Dasari V R

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Jun 3, 2020

Nice

By gajveer s r

•

Nov 21, 2019

fsd

By LAVANYA S 1

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Apr 23, 2020

Too delayed to earn this certificate because of not reviewed in the peer-graded assignment.I extended the due dates twice in April 13,2020 and April 20,2020 and now finally I got my certificate.This is the only negative thing that I felt.Please make sure that others peers wont get this complication.

By moshe j

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Sep 23, 2024

my main intent in doing this course was to learn about the AES algorithm. Unfortunately, the AES was only briefly mentioned. However, i did find the remaining course material engaging & interesting.

By Shrey B

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Nov 30, 2020

This course helps in clearing all the topics in which i have doubt. I have learned new concepts from this.

By Nikhil Y

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Jun 4, 2020

it was an amazing experience!!

By Gosai G

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Sep 19, 2020

great

By San'atbek S

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Jan 10, 2025

Yeah

By Heinz D

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Feb 16, 2025

I learned / refreshed a lot during this course. The lecturer has great knowledge. The english transcripts need serious amendments. Mixing up the terms alphabet and letter / character is confusing everyone. There is a valuation error in a video of week 3, which was discussed in the forum 6 years ago and it is still wrong (I consider this unprofessional and/or ignorant). The learner must write pseudocode - which I was not aware of before starting the course - and the respective peer-graded reviews are challenging.