System Security

System Security

1. Network Threats

   • Malware
     • Malware is malicious software that is designed to hack a system.
       • Viruses - Self replicating to damage/delete files.
       • Worms - Self replicating and spread through files.
       • Trojan Horse - Pretend to be legitimate, deceive the user.
       • Spyware - Monitor user activity, send back to hacker
       • Ransomware - Blackmail user
   • Phishing
   • Social Engineering
   • Brute Force Attacks
   • Denial of Service (DoS) Attacks
     • A deliberate attempt to prevent legitimate users of a network from accessing the services provided by the server or connected systems.
   • Data Interception + Theft
   • SQL Injection
   • Poor Network Policy

2. Identifying & Preventing Vulnerabilities

   • Penetration Testing
     • Penetration testing is used to determine how resilient a network is against an attack.
   • Network Forensics
     • Monitoring the traffic on a network. At regular intervals transmitted data packets are copied.
   • Network Policies
     • Hard-to-guess passwords, Change password on a regular basis, Regular backup, Preventing physical access
   • Anti-Malware Software
     • Anti-Malware Software has 3 purposes: To detect malware that has been installed, To prevent malware from being installed, To remove malware from the system.
   • Firewall
     • Montiors traffic going in and out of a computer or network, it either blocks the packet or lets it pass.
   • User Access Levels
     • Examples include: software, email, internet access, documents and data, the ability to install and/or remove software, the ability to maintain other users' accounts.
   • Passwords
     • At least eight characters, including at least one uppercase letter, one number and one special character. Longer passwords are better than shorter passwords.
   • Encryption
     • Encryption is the process of disguising data so that it cannot be understood. Even if a hacker gains access to encrypted data, they will not be able to understand it.