Questions may cover: techniques; passwords; attacks; a New Zealand-based* organisation’s policies or practices.
An online interactive resource for high school students learning about computer science.
University of Auckland has a more gamification approach
Learn from Research and filling in a Digital Notebook which will form part as Study Notes.
Learn from applying your knowledge of Encryption with a little application.
The mechanisms are not a list of distinct ideas from computer science, but general terms that put the focus on how things work rather than just what they achieve. The challenge for you is to talk about TWO DISTINCT mechanisms that come within the broad descriptions.
Remember you need to choose between techniques/algorithms AND protocols/procedures that shape the concept for the External.