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Studying Computer Science at Salford

In Investiga estigating Metada ting Metadata ta

Dr Rob Hegarty

Introduction

• Dr Rob Hegarty
• Senior Lecturer
• Teaching – Cyber Security, Digital Forensics, Threat Intelligence
• Researching – Cyber Security, Digital Forensics, Emerging Technologies; IoT, Cloud, etc.
• Previous Experience
• Senior Lecturer Manchester Metropolitan University
• Consulting, Training, Developing for Greater Manchester Police
• Postdoctoral Researcher Liverpool John Moores University
• Police Trainer (Merseyside, Abu Dhabi, Kuwait)
• Software Developer (Merseyside Police, Cheshire Constabulary)
• PhD Digital Investigations (Cloud)
• System Administrator
• Supply Teacher
• Education; BSc Software Engineering, MSc Cyber Security, PhD Cyber Security / Forensics

Overview

• During this session you will learn about:
• Virtualisation
• Metadata
• Compiling programs
• Linux and the Command Line Interface
• Metadata Extraction
• Metadata Analysis and Interpretation
• Employability

Virtualisation

• Creating virtual resources from physical resources
• Examples:
• Virtual Machines
• Virtual Networks
• Virtual Hard Drives
• Benefits
• Resource Utilisation
• Resource Isolation
• Running Multiple Operating Systems Concurrently

VirtualBox

Metadata

• Metadata is data that describes other data
• Example; Telephone Call
• Caller Number
• Recipient Number
• Start and End Time of Call
• Call Duration
• Example; JPEG EXIF Data
• Camera/Phone Model
• Time and data of capture
• Lens details
• Geo-coordinates

Linux and Command Line Interfaces

• Linux is a free open source operating system
• Command Line Interfaces e.g. Bash Shell, Power Shell, etc
• Used by power users
• Facilitate rapid input and execution of commands
• Commands can be linked together to achieve goals
• Are the only interface to many systems
• Useful Commands
• whoami, pwd, ls, cd

Extracting Metadata

• Many tools available:
• GUI (Graphical User Interface) Applications or Apps
• Websites (Privacy Issues?)
• Command Line Applications
• Jhead – Cross Platform (Windows, Mac, Linux), open source
• ImageMagick – Linux Only, open source

Analysing and Interpreting Metadata

• Mobile devices geo-locate using a variety of methods
• GPS
• Cell Tower Triangulation
• Wi-Fi
• Bluetooth / Ultrawide band
• Fusion of methods
• The accuracy of the metadata is determined by many factors:
• Cell Tower Range
• GPS Accuracy
• Open Source Intelligence can augment the results

Practical Exercise Resources

• Windows (PowerShell or cmd) or Linux (Shell)
• Jhead - Jhead - https://www.sentex.ca/~mwandel/jhead/
• Test Images - https://github.com/arc2h/photos

Listing Files and Unpacking Archives

Compiling JHead

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Employability

Computer Science offers a wide variety of career paths

• Software Developer
• Web Developer
• DevOps
• Security Analyst
• Cyber Forensics Analyst
• Penetration Tester
• Data Scientist

Summary

• This lab covers a wide variety of areas, we are here to help you

develop your skills in these and many other areas:

• Virtualisation
• Linux
• Metadata
• Command Line Interfaces
• Compiling programs
• Careers

Resources

• Programme details

https://www.firstyearmatters.info/cs/programmes.html

• VirtualBox - https://www.virtualbox.org/
• Jhead - https://www.sentex.ca/~mwandel/jhead/
• Raspberry Pi - https://www.raspberrypi.org/

Questions

• Rob Hegarty – R.C.Hegarty@salford.ac.uk
• Other contacts
• https://beta.salford.ac.uk/science-engineering-and-environment

THANKS FOR ATTENDING OUR PRESENTATION

To see what other presentations are available today, please go back to our event hub www.salford.ac.uk/visit/25-april-2020