Network Intrusion Detection

Intrusion

Network Intrusion

• Unauthorized access to a computer network, often to steal sensitive data or disrupt operations
• Types of network intrusions:
  • Insider threats: Authorized personnel with access to the network
  • Outsider threats: Unauthorized individuals gaining access
• Methods of network intrusion:
  • Hacking: Unauthorized access using technical skills
  • Phishing: Tricking users into revealing sensitive information
  • Backdoors: Secretly installed malware allowing unauthorized access
• Detection and prevention methods:
  • Firewalls and intrusion detection systems
  • Encryption and secure protocols
  • Regular software updates and patches

Social Engineering

• Psychological manipulation to trick individuals into divulging sensitive information or gaining unauthorized access
• Types of social engineering attacks:
  • Phishing: Fraudulent emails, texts, or messages
  • Pretexting: Creating a fake scenario to gain trust
  • Baiting: Leaving malware-infected devices or storage devices in public areas
  • Quid pro quo: Offering services or benefits in exchange for sensitive information
• Prevention methods:
  • Employee education and awareness
  • Verification of identities and requests
  • Implementing strict security policies

SQL Injection

• Type of web application security vulnerability
• Occurs when an attacker injects malicious SQL code to access or modify sensitive data
• Methods of SQL injection:
  • Classic SQL injection: Inserting malicious code as user input
  • Blind SQL injection: Inferring database structure and data without direct output
  • Time-based SQL injection: Inferring data by measuring response times
• Prevention methods:
  • Input validation and sanitization
  • Prepared statements and parameterized queries
  • Regular security audits and penetration testing

Network Security Threats

• Network intrusion: unauthorized access to a computer network to steal sensitive data or disrupt operations
• Insider threats: authorized personnel with access to the network can intentionally or unintentionally cause harm
• Outsider threats: unauthorized individuals gaining access to the network using hacking, phishing, or backdoors

Social Engineering

• Psychological manipulation to trick individuals into divulging sensitive information or gaining unauthorized access
• Phishing: fraudulent emails, texts, or messages to trick users into revealing sensitive information
• Pretexting: creating a fake scenario to gain trust and access to sensitive information
• Baiting: leaving malware-infected devices or storage devices in public areas to trick users into installing malware
• Quid pro quo: offering services or benefits in exchange for sensitive information

SQL Injection

• Type of web application security vulnerability where an attacker injects malicious SQL code to access or modify sensitive data
• Classic SQL injection: inserting malicious code as user input to access or modify sensitive data
• Blind SQL injection: inferring database structure and data without direct output
• Time-based SQL injection: inferring data by measuring response times

Prevention Methods

• Implementing firewalls and intrusion detection systems to detect and prevent network intrusions
• Encrypting data and using secure protocols to protect against hacking and phishing
• Conducting regular software updates and patches to prevent exploitation of vulnerabilities
• Educating employees about social engineering attacks and implementing strict security policies
• Validating user input and sanitizing data to prevent SQL injection attacks
• Using prepared statements and parameterized queries to prevent SQL injection attacks