cybersecurity

cybersecurity

1. encryption

   • ciphers
     • caesar cipher
     • substitution cipher
       • a simple cipher, where each letter is replaced by a different letter
   • key
     • the imformation needed
   • plaintext
     • the unencrypted data
   • ciphertext
     • the encrypted data
   • cracking
     • brute force
     • statistical attack
     • cracking is decryting it without a key

2. cyber defences

   • backups
     • keeping a copy of important data on a different system, so that it can be restored if the original gets damaged
   • security software
     • often called antivirus software even though it deals with more than just viruses, scams computers for known malware and removes it. must be kept up to date with the latest malware definitions
   • ethical hacking
     • white hat hacking
       • hacking that is done with authorisation of the companybeing hacked. the hacker produces a report of all the vulnerabilities they found, so that the company can fix them
     • grey-hat hacking
       • hacking done without the authorisation of the company will be imformed of howthe hacker gained the files

3. cyberattacks

   • phishing
     • phishing is a very common scam, used to gain acces to your social media
   • malware
     • keyloggers
       • a key logger logs all key storkes and sends them too cyber crimimaols for prossesing
     • botnets
       • a botnet is a network of computers which recevie and execute instructions from a cyber crimimal
     • ransomware
       • ransomware energypts your files and blackmail you for their decryption

4. hacking

   • unautherised access to computer material