Investigators of Digital Evidence: Main Challenges and Solutions

In the realm of digital forensic investigations, a range of methods are utilized to retrieve data, with a strong emphasis on comprehending the storage mechanisms employed by various types of storage devices. This not only encompasses fixed or portable storage units but also extends to smartphones, cameras, and any device capable of storing data in a digital format, regardless of nomenclature. Knowledge of the structure and organization of data on these storage units is crucial for executing data recovery techniques. However, as technology advances and user awareness of technology grows, safeguarding data, particularly personal data, has become paramount. Consequently, a multitude of techniques have emerged to encrypt and protect the confidentiality of personal information. Criminals exploit these tools to conceal their data, thereby impeding digital investigators from accessing incriminating evidence and bringing them to justice. In the field of digital forensics, these tools are referred to as Anti-Forensic Techniques, which involve encrypting data at the physical and bit-layer levels. Although data is typically encrypted with a password to prevent unauthorized access, cunning methods can circumvent the password and gain access to the original unencrypted data at the physical layer. This research paper delves into the obstacles encountered by digital investigators when dealing with Anti-Forensic Tools and the proper analysis of encrypted storage units. By implementing encryption at both the physical and bit layers, these deceptive techniques lose their effectiveness. The ultimate goal is to obtain maximum information from these encrypted storage units, enabling the successful prosecution of criminals. Additionally, the paper examines the broader field of digital forensic investigations and the challenges that arise throughout the process.