AQA A’Level SLR13 Encryption – Vernam cipher
About this video
AQA Specification Reference
AS Level 3.5.6.8
A Level 4.5.6.10
This video looks the Vernam cipher, which is as example of a one-time pad cipher. We explain why one-time pad ciphers like this as considered cyphers with perfect security.
Key questions:
- What is the Vernam cipher and how does it work?
- What do we mean by the phrase "one-time pad"?
00:00 Encryption - Vernam cipher
00:09 Intro
00:14 A note about this video
00:25 Vernam cipher
03:07 Key questions
03:18 Outro
Last updated: 13.05.25
