PresentationPrepare and deliver the expert report or technical report with the results of the data analysis. The report must be clear, objective, impartial, and based on the evidence found. The report should contain information such as: identification of the expert, the requester, and the object of the expert analysis; description of the procedures adopted; answers…
Presentation
Prepare and deliver the expert report or technical report with the results of the data analysis. The report must be clear, objective, impartial, and based on the evidence found. The report should contain information such as: identification of the expert, the requester, and the object of the expert analysis; description of the procedures adopted; answers to the questions; connections; attachments and references.
Techniques for conducting the expert analysis
Digital forensics in digital documents can use various techniques to analyze the data found and preserved. Some of the most common techniques are:
Metadata analysis
Examine the hidden data that accompanies the files of digital documents and that may contain information such as: creation, modification, and access dates and times; author; program used; geographic location; digital signature; etc. Metadata analysis can reveal the origin, authorship, and history of digital documents.
Hash Analysis
Calculate a unique numerical value (called a hash) for each file in digital documents and compare it to other previously known or calculated values. A hash analysis can verify if files have been altered or added to in any way.
Digital Signature Analysis
Verify if digital documents have a valid electronic signature that attests to their integrity and completeness. The digital signature is generated using a pair of cryptographic keys (public and private) linked to the document signer. Digital signature analysis can confirm if the signer possesses a private key corresponding to the public key used in the signature and if the document has not been altered after signing.
Content Analysis
Examine the textual or visual content of digital documents to identify possible inconsistencies, anomalies, contradictions, or fraud. Content analysis can use techniques such as: comparison between different versions of the same document; verification of the coherence between the content and the context of the document; detection of graphic manipulations (such as cutouts, collages, blurs, etc.); Data recovery from deleted or hidden data; etc.
International sources on digital forensics in digital documents
In addition, I will present four international websites that address different aspects of digital forensics in digital documents, an activity that aims to analyze and investigate digital documents that are the subject of interest or controversy in various situations. The websites are:
NIST publishes review of digital forensic methods: this website is from the National Institute of Standards and Technology (NIST), a United States government agency that publishes studies and standards on various areas of science and technology, including digital forensics. On this website, you can find a report that reviews the methods that digital experts use to analyze evidence from computers, cell phones, and other electronic devices.
Approaches to detecting document forgery in digital forensic science: a review: this website is from a scientific article published in the SpringerLink journal, a platform for academic publications in various fields of knowledge. In this article, you can find a review of approaches for detecting document forgery in digital forensics, including techniques based on image processing, video processing, and spectroscopy.
What is Digital Forensics? History, Process, Types, Challenges – Guru99: this site is from an educational portal that offers courses and tutorials on various topics related to information technology. On this site, you can find information about what digital forensics is, its history, its process, its types, and its challenges.
AI Digital Forensics: Evaluating, Standardizing, and Optimizing Digital Forensic Techniques: this site is from another scientific article published in the SpringerLink journal. In this article, you can find a proposal for three critical instruments for the development of digital forensic methodologies based on artificial intelligence, covering methods for evaluating, standardizing, and improving the techniques applicable to artificial intelligence models used in digital forensics.
Conclusion
Digital forensics of digital documents is an important and challenging activity that addresses technical and legal issues related to digital documents that are the subject of interest or controversy in various situations. Digital forensics of digital documents follows a forensic methodology based on four stages: collection, preservation, examination, and presentation of digital evidence. Digital forensics of digital documents uses various techniques to perform the analysis of…
