Fault Injection is the process of intentionally adding defects to a system to test its detection and recovery capabilities.
Key Aspects:
1. Deliberately introduce errors
2. Observe system behaviour
3. Evaluate detection mechanisms
4. Test recovery processes
Types of Fault Injection:
1. Software-based (modifying code or data)
2. Hardware-based (altering physical components)
3. Network-based (disrupting communications)
4. Environmental (changing operating conditions)
Benefits:
1. Improves system robustness
2. Identifies weaknesses in error handling
3. Enhances reliability testing
4. Supports security analysis
Fault injection is commonly used in critical systems development and cybersecurity testing.