Digital Forensics

Digital forensics is an interdisciplinary field that enables the use of data stored in digital environments as evidence in legal proceedings. The term “digital forensics,” used as the English equivalent of “computer forensics,” aims to conduct the collection, preservation, analysis, and presentation of digital data in accordance with technical and legal principles. The primary objective in this process is to obtain digital traces without altering them and to ensure their admissibility in judicial proceedings.

Development Process and Need

With the widespread adoption of information technologies, criminal methods have increasingly incorporated digital tools, rendering traditional evidence-gathering techniques inadequate. Email, social media, network traffic, mobile devices, and other digital environments have become arenas where crimes are committed or planned. In this context, digital forensics has evolved as a supportive sub-discipline of criminal procedure law. In Türkiye, institutional efforts in this field can be exemplified by the General Directorate of Security, the Gendarmerie Command, and the Forensic Medicine Institution.

Interdisciplinary Structure

Digital forensics lies at the intersection of various disciplines including computer engineering, information security, criminal law, and criminology. While technical tools and software are employed to obtain digital evidence, the legal compliance of the process is ensured through contributions from the legal discipline. Digital forensics experts are obligated to conduct technical analyses in accordance with legal rules.

Application Areas and Types

Digital forensics is examined under four main categories:

• Computer digital forensics: Involves examinations of sources such as hard drives, file systems, deleted data, and system logs on personal computers.
• Network and internet digital forensics: Includes analysis of internet and local network traffic, server logs, and data packets.
• Embedded systems and mobile digital forensics: Focuses on extracting data from mobile devices, USB drives, portable media players, and GPS systems.
• Social network digital forensics: Used to investigate social media activities conducted via Web 2.0 tools and to identify digital traces of crimes committed in these environments.

Digital Forensics Process

The digital forensics process generally consists of four stages:

• Evidence acquisition: Devices containing digital data are seized following specific protocols to create forensic images.
• Identification: Meaningful elements potentially related to the crime are identified and classified from the raw data collected.
• Evaluation: The identified data are analyzed to produce evidence that aids in clarifying the crime.
• Presentation: The discovered evidence is submitted to investigative and judicial authorities in the form of technical reports.

Methods and Techniques

Methods used in digital forensics include data recovery, imaging, decryption, log analysis, content matching, and spatiotemporal analysis. Maintaining evidence integrity and documenting any intervention traces is of critical importance. Controversial techniques such as remote search must be carefully evaluated within the context of fundamental rights and freedoms.

Legal Framework

Digital forensics activities are carried out within the legal framework established by regulations concerning the acquisition of electronic evidence, notably Article 134 of Law No. 5271 on Criminal Procedure. Evidence collected under this framework must be gathered in accordance with the principle of legality; otherwise, it becomes inadmissible in judicial proceedings.

Digital Forensics Engineering

Digital forensics engineering is a discipline built upon computer engineering principles, aiming to develop expertise in digital forensics. The first undergraduate program in this field in Türkiye was established at Fırat University. The program includes technical courses such as network and system security, information security, and digital evidence analysis, alongside law-based courses. Graduates can work in public institutions, security organizations, forensic medicine institutions, and the private sector.

Current Developments and Risks

Technologies such as artificial intelligence, big data analysis, and machine learning are increasingly being utilized in digital forensics. However, manipulation techniques like deepfakes and digital disinformation also present new challenges for digital forensics experts. These developments demand advanced technical expertise and ethical sensitivity in evidence evaluation processes.

Digital forensics has become a vital tool for uncovering crimes in the digital age. Through technically sound analyses conducted in compliance with legal procedures, it enables both the identification of offenders and the proof of innocence. As an interdisciplinary field bridging information technologies and criminal justice, it constitutes a professional specialty grounded in both technical and legal knowledge.