☰ Year plan · Communication Technology

Keeping information safe

Week 2 · Chapter 3 Information Security: aims and threats, malware, passwords and authentication, tricks that fool people, encryption, digital signatures and secure websites · 3 lessons
Answers are for parents and teachers.
1
Match each malware to its job: virus, worm, spyware, ransomware. Jobs: (a) locks files for money, (b) spreads by itself over a network, (c) collects information secretly, (d) attaches itself to a file.
2
A code has 4 places and each place holds one of 10 digits. How many codes are there? What if a fifth place is added?
3
Decode LQIRUPDWLRQ with a shift of 3 (move each letter three places back).
4
Name three signs that a message may be phishing, and say what you do.
5
Explain in two sentences why a public key can safely be shown to everybody.