課程概述
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.
篩選依據：
1 - Symmetric Cryptography 的 8 個評論（共 8 個）
創建者 Mohamed T
•Jun 19, 2018
Excellent course
創建者 CHITTILLA V V
•Jan 18, 2018
Excellent course
創建者 Georgios P
•May 25, 2019
Great course presented in an simple way!
創建者 Benedict J W
•May 27, 2019
Brilliant!
創建者 Manuel A D R
•Aug 01, 2019
excellent course
創建者 M M S
•Mar 31, 2018
Reviewing assignment is no one is there
創建者 Ivon S S Q
•May 23, 2019
is very difficult to understand.
創建者 Parth S
•Oct 27, 2019
The instructor is not teaching the stuff that comes in the quizzes which makes the quizzes very difficult to pass and he is not able to develop interest in the subject.
