Digital Forensics

What is Digital Forensics?

Digital Forensics is the discipline concerned with identifying, preserving, recovering, analysing and presenting digital evidence. Evidence may originate from hard drives, RAM, system logs, network traffic, mobile devices, cloud services and IoT devices.

The forensic process rests on several fundamental principles. Evidence integrity - every step must be documented and original data is never modified (analysis is performed on bitwise copies). Chain of custody - documentation of who had access to evidence and when. Reproducibility - another expert should be able to replicate the analysis and reach the same conclusions.

Key forensic specialisations include disk analysis (file system forensics), memory analysis (memory forensics), network analysis (network forensics), mobile device analysis (mobile forensics) and cloud analysis (cloud forensics). Each requires specialist tools and competencies.

Why does it matter?

Digital forensics is essential in two contexts. First, during incident response - forensic analysis determines how the attacker gained access to the network, what data was compromised and whether the threat has been fully eliminated. Second, in legal proceedings - digital evidence preserved according to forensic procedures can be used in criminal, civil or disciplinary proceedings.

Related topics

• Incident Response
• Malware Analysis
• SOC