Journal of Digital Forensics, Security and Law

Number 2, 2006

5-18
Development of a National Repository of Digital Forensic Intelligence

Authors: Mark Weiser, David P. Biros, Greg Mosier

Abstract

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Number of views: 325

Many people do all of their banking online, we and our children communicate with peers through computer systems, and there are many jobs that require near continuous interaction with computer systems. Criminals, however, are also “connected”, and our online interaction provides them a conduit into our information like never before. Our credit card numbers and other fiscal information are at risk, our children's personal information is exposed to the world, and our professional reputations are on the line. The discipline of Digital Forensics in law enforcement agencies around the nation and world has grown to match the increased risk and potential for cyber crimes. Even crimes that are not themselves computer-based, may be solved or prosecuted based on digital evidence left behind by the perpetrator. However, no widely accepted mechanism to facilitate sharing of ideas and methodologies has emerged. Different agencies re-develop approaches that have been tested in other jurisdictions. Even within a single agency, there is often significant redundant work. There is great potential efficiency gain in sharing information from digital forensic investigations. This paper describes an on-going design and development project between Oklahoma State University’s Center for Telecommunications and Network Security and the Defense Cyber Crimes Center to develop a Repository of Digital Forensic Knowledge. In its full implementation, the system has potential to provide exceptional gains in efficiency for examiners and investigators. It provides a better conduit to share relevant information between agencies and a structure through which cases can be cross-referenced to have the most impact on a current investigation.

19-38
Computer Forensics Field Triage Process Model

Authors: Marcus K. Rogers, James Goldman, Rick Mislan, Timothy Wedge, Steve Debrota

Abstract

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Number of views: 331

With the proliferation of digital based evidence, the need for the timely identification, analysis and interpretation of digital evidence is becoming more crucial. In many investigations critical information is required while at the scene or within a short period of time - measured in hours as opposed to days. The traditional cyber forensics approach of seizing a system(s)/media, transporting it to the lab, making a forensic image(s), and then searching the entire system for potential evidence, is no longer appropriate in some circumstances. In cases such as child abductions, pedophiles, missing or exploited persons, time is of the essence. In these types of cases, investigators dealing with the suspect or crime scene need investigative leads quickly; in some cases it is the difference between life and death for the victim(s). The Cyber Forensic Field Triage Process Model (CFFTPM) proposes an onsite or field approach for providing the identification, analysis and interpretation of digital evidence in a short time frame, without the requirement of having to take the system(s)/media back to the lab for an in-depth examination or acquiring a complete forensic image(s). The proposed model adheres to commonly held forensic principles, and does not negate the ability that once the initial field triage is concluded, the system(s)/storage media be transported back to a lab environment for a more thorough examination and analysis. The CFFTPM has been successfully used in various real world cases, and its investigative importance and pragmatic approach has been amply demonstrated. Furthermore, the derived evidence from these cases has not been challenged in the court proceedings where it has been introduced. The current article describes the CFFTPM in detail, discusses the model’s forensic soundness, investigative support capabilities and practical considerations.

39-74
Development and Delivery of Coursework: The Legal/Regulatory/Policy Environment of Cyberforensics

Authors: John W. Bagby, John C. Ruhnka

Abstract

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Number of views: 304

This paper describes a cyber-forensics course that integrates important public policy and legal issues as well as relevant forensic techniques. Cyber-forensics refers to the amalgam of multi-disciplinary activities involved in the identification, gathering, handling, custody, use and security of electronic files and records, involving expertise from the forensic domain, and which produces evidence useful in the proof of facts for both commercial and legal activities. The legal and regulatory environment in which electronic discovery takes place is of critical importance to cyber-forensics experts because the legal process imposes both constraints and opportunities for the effective use of evidence gathered through cyber-forensic techniques. This paper discusses different pedagogies that can be used (including project teams, research and writing assignments, student presentations, case analyses, class activities and participation and examinations), evaluation methods, problem-based learning approaches and critical thinking analysis. A survey and evaluation is provided of the growing body of applicable print and online materials that can be utilized. Target populations for such a course includes students with majors, minors or supporting elective coursework in law, information sciences, information technology, computer science, computer engineering, financial fraud, security and information assurance, forensic aspects of cyber security, privacy, and electronic commerce.

75-94
Forensic Tools for Mobile Phone Subscriber Identity Modules

Authors: Wayne Jansen, Rick Ayers

Abstract

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Number of views: 328

Mobile phones and other handheld devices incorporating cellular capabilities, such as Personal Digital Assistants, are ubiquitous. Besides placing calls, these devices allow users to perform other useful tasks, including text messaging and phonebook entry management. When cell phones and cellular devices are involved in a crime or other incident, forensic specialists require tools that allow the proper retrieval and speedy examination of data present on the device. For devices conforming to the Global System for Mobile Communications (GSM) standards, certain data such as dialed numbers, text messages, and phonebook entries are maintained on a Subscriber Identity Module (SIM). This paper gives a snapshot of the state of the art of forensic software tools for SIMs and an explanation of the types of digital evidence they can recover.