What are the main techniques used in network intrusion detection systems (NIDS)? How do signature-based and anomaly-based detection methods work, and what are their respective advantages and limitations?
Malware, or malicious software, comes in various forms, each with unique infection methods and impacts. Here’s a simple breakdown: Viruses How They Work: Viruses attach to legitimate files. When you open the infected file, the virus spreads to other files. Impact: Can corrupt or delete data, slow doRead more
Malware, or malicious software, comes in various forms, each with unique infection methods and impacts. Here’s a simple breakdown:
- Viruses
How They Work: Viruses attach to legitimate files. When you open the infected file, the virus spreads to other files.
Impact: Can corrupt or delete data, slow down your computer, and disrupt normal functions.
Example: The Melissa Virus spread via email attachments in the late 1990s.
Prevention: Use antivirus software, update it regularly, and avoid suspicious emails or downloads.
- Worms
How They Work: Worms are standalone programs that self-replicate and spread across networks without needing a host file.
Impact: Can consume bandwidth and overload servers, causing network slowdowns.
Example: The WannaCry Worm exploited a Windows vulnerability in 2017.
Prevention: Keep software updated, use firewalls, and segment networks.
- Trojans
How They Work: Trojans disguise themselves as legitimate software, tricking you into installing them. Once active, they perform harmful actions.
Impact: Can create backdoors for other malware, steal data, and monitor your activities.
Example: The Zeus Trojan targets banking information.
Prevention: Use security software, download only from trusted sources, and be cautious of phishing.
- Ransomware
How They Work: Ransomware spreads through phishing emails or malicious downloads. It encrypts your files and demands payment for decryption.
Impact: Can make your data and systems unusable until the ransom is paid.
Example: The CryptoLocker Ransomware demanded payment in Bitcoin to unlock files.
Prevention: Regularly back up data, use strong spam filters, and keep security software updated.
Understanding these types of malware and their prevention methods can help protect your devices from malicious attacks.
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Main Techniques in Network Intrusion Detection Systems (NIDS) Signature-Based Detection: Matches network traffic against a database of known threat signatures (patterns of known attacks). Anomaly-Based Detection: Establishes a baseline of normal network behavior and detects deviations from this normRead more