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1. Cyber attacks

   • Malware
     • Botnets
       • Network of computers infected by hacker.
     • Keyloggers
       • Malware records keypress sends back to hacker for analysis.
     • Ransomware
       • Enrypts users files demands ransom to decrypt.
   • Phishing

2. Cyber defences

   • Backups
     • Icloud
   • Security software
     • Anti virus.
   • Ethical software
     • White-hat hacking
       • Permission to hack report back to improve security.
     • Grey-hat hacking
       • No permission but good intention.

3. Encryption

   • Cracking
     • Brute force
       • Hack until successful.
     • Statistical Attack
       • Hack using estimates and values.
   • Ciphers
     • Caesar cipher
     • Substitution cipher
   • Key
   • Plaintext
   • Ciphertext