Forensic Computing: A Practitioner's Guide

Capa
Springer Science & Business Media, 2000 - 295 páginas
This volume shows how information held in computer systems can be recovered and how it may be deliberately hidden or subverted for criminal purposes. Forensic Computing: A Practitioner's Guide is illustrated by plenty of case studies and worked examples, to help practitioners and students gain a clear understanding of: how to recover information from computer systems in such a way as to ensure that its integrity cannot be challenged and that it will be accepted as admissible evidence in court; the principles involved in password protection and data encryption; the evaluation procedures used in circumventing these safeguards; the particular legal issues associated with computer-generated evidence; and how to ensure admissibility of such evidence.

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Índice

1 Forensic Computing
3
Origin of the Book
4
Structure of the Book
5
References
7
2 Understanding Information
9
Binary Systems and Memory
10
Addressing
11
Number Systems
13
Encoding Methods and Formats for Hard Disks
103
The Formatting Process
114
Hard Disk Interfaces
117
IDEATA Problems and Workarounds
126
The POSTBoot Sequence
137
The Master Boot Record and Partitions
148
FATs Directories and File Systems
159
Hiding and Recovering Information
170

Characters
24
Computer Programs
25
File Types and Signatures
27
Word Processing Formats
28
Magic Numbers
31
Graphic Formats
32
Archive formats
37
Other Applications
39
Quick View Plus
40
References
42
3 IT Systems Concepts
43
Two Black Boxes
44
The Worked Example
47
Program Data Rules and Objects
55
Software Development
57
Breaking Sequence
59
An Information Processing System
62
Exercises
63
4 PC Hardware and Inside the Box
67
The Buses and the Motherboard
69
Intel Processors and the Design of the PC
78
The Pentium Pentium Pro Pentium II and Pentium III
83
A Few Words about Memory
84
Backing Store Devices
87
External Peripherals
89
References
91
5 Disk Geometry
93
Five Main Issues
94
Formation of Addressable Elements
96
Encoding Methods and Formats for Floppy Disks
97
Construction of Hard Disk Systems
102
RAID
173
References
175
6 The Treatment of PCs
179
The ACPO Good Practice Guide
180
Search and Seizure
181
Computer Examination Initial Steps
189
Imaging and Copying
191
References
199
7 The Treatment of Electronic Organizers
201
Application of the ACPO Good Practice Guide Principles
208
Examination of Organizers and What May Be Possible
210
A Final Word about Electronic Organizers
217
8 Looking Ahead Just a Little Bit
219
Bigger and Bigger Disks
220
Networked Systems Add to the Problems
222
Encryption
223
A Final Word
227
References
228
Bibliography
229
Codes
237
Appendix 2 Some Common File Format Signatures
241
Appendix 3 A Typical Set of POST Codes
245
Codes and Error Messages
249
Appendix 5 Disk Partition Types
253
Appendix 6 Extended Partitions
257
Appendix 7 Registers and Order Code for the Intel 8086
262
Answers to Exercises
270
Glossary
278
Index
292
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