048. OCR A Level (H446) SLR9 – 1.3 Symmetric & asymmetric encryption
About this video
OCR Specification Reference
A Level 1.3.1c
In this video we take a look at the two main forms of encryption you need to know about for the exam: Symmetric and Asymmetric.
Key question:
- How does encryption work?
00:00 Symmetric and asymmetric encryption
00:06 Intro
00:11 What is encryption?
00:26 Simple encryption using Caesar cipher
01:00 Symmetric encryption
01:50 Asymmetric encryption
06:30 Key question
06:40 Going beyond the specification
06:53 How easy is it to crack an encryption key?
08:09 Outro
Last updated: 08.05.26
