Cyber security

Cyber security

1. Encryption

   • Encryption is the process of making data unreadable. Only the key can make the data readable.
   • The text that hasn't been encrypted is called plain text. The encrypted text is called cyphertext
   • Modern enryptions are computatinaly secure meaning that it can not be cracked within a reasonable amount of time
   • Brute force is using very possible key until you get lucky. Statistacle attacks are using knowledge and estimates the find out the key

2. Cyber attacks

   • Malware is any malicious software that is doing your computer harm
   • Phishing is a very comon attack. An email is sent to you telling you to log in to somthing. The it sends your login details to the hacker so that they can access whatever it is they asked you to login to
   • Ransomware is a software that encrypts your files and demands money for them to unencrypted. The money goes to the hacker.
   • A botnet is a network of computers which receive and exacute instructions from a cyber criminal.
   • A keylogger logs all the keys you press and sends it back to the cyber criminal for analasis so that they can figure out your details and passwords.

3. Cyber Defences

   • White hat hackers are people who are employed by a company to try and breach their defences and tell the company where the weakness is so that they can fix it.
   • Backups are copies of important data that are stored on as seperate system. If any data is lost or damaged then it can be restored from the backup.
   • Antivirus software is a software that is running at all times and protects your computer from malware. It wil scan your computer for known malware and reomoves it. However it must be kept up to date with the latest malware defenintions.