099. AQA A Level SLR13 Encryption – Caesar cipher
About this video
AQA Specification Reference
AS Level 3.5.6.8
A Level 4.5.6.10
This video starts by introducing the concept of encryption. It then goes onto explain one of the first, and simplest forms of encryption, the Caesar cipher, we all discuss why it is so easily cracked.
Key questions:
- What is meant by the terms cipher, plaintext, ciphertext and encryption?
- What is the Caesar cipher and how does it work?
00:00 Encryption- Caesar cipher
00:09 Intro
00:14 What is encryption?
00:44 Basics of encryption
01:36 Encryption recap: Essential terms
01:59 Simple encryption using Caesar cipher
02:32 Levels of security offered by different encryption methods
03:13 Key questions
03:25 Outro
Last updated: 04.09.25
