OCR GCSE Computer Science (J277)Specification point 1.4.2

OCR J277 1.4.2: Identifying and preventing vulnerabilities

The free BugBot lessons that teach this point, a robot to try it on, and the past-paper questions that test it.

Lessons that teach it

1. F11.5 Passwords and authentication Cyber security
   Ways to authenticate, strong passwords, 2FA, CAPTCHA and hashing.
2. F11.6 Encryption Cyber security
   Plaintext, keys and ciphertext, the Caesar cipher, symmetric and asymmetric, and a secret over the radio.
3. F11.7 Defending a network Cyber security
   Firewalls, anti-malware, access levels, updates, backups, penetration testing and policies.
4. F11.8 Writing secure programs Cyber security
   Validating input, access levels in code, and testing for security.
5. F11.9 Project: secure the robot Cyber security
   Authenticate with a password, decrypt an encrypted command, and act on it.

Try it on a robot

The task from F11.5 Passwords and authentication, running here. Change the program and press Run.

Past paper questions on this

Real exam questions that test this, each worked through with a program you can run.

• Edexcel 1CP2 June 2024 Paper 2, Question 2: Choose the right lines to make a Caesar cipher with ord() and chr() 10 marks

The specification is OCR's own document; this page says which of our lessons teach point 1.4.2 and is not endorsed by the board.