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Electronic Evidence and Electronic Signatures: Copyright

Electronic Evidence and Electronic Signatures
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table of contents
  1. Cover
  2. Title Page
  3. Copyright Page
  4. List of Contributors
  5. A note on our Creative Commons licence
  6. Dedication
  7. Contents
  8. Software is reliable and robust
  9. Preface
  10. Acknowledgments
  11. Table of statutes
  12. Table of cases
  13. 1. The sources and characteristics of electronic evidence and artificial intelligence
    1. Digital devices
      1. Processors
      2. Mobile devices
      3. Embedded devices
      4. Software
      5. Data storage facilities
      6. Data formats
      7. Starting a computer
    2. Networks
      1. Types of network
      2. Cloud computing
      3. The Internet of Things
      4. The deep web and the dark web
      5. Common network applications
    3. Types of evidence available on a digital device
      1. Files
      2. Metadata
      3. Imaging
      4. System and program logs
      5. Temporary files and cache files
      6. Deleted or ‘lost’ files
      7. Simulations, data visualizations, augmented and virtual reality
      8. Encryption and obfuscated data
    4. Artificial intelligence and machine learning
      1. Simulations, data visualizations, augmented and virtual reality
      2. Transparency and explainability
      3. AI adversarial attacks
    5. Defining electronic evidence
      1. The dependency on machinery and software
      2. The mediation of technology
      3. Speed of change
      4. Volume and replication
      5. Storage and disclosure
    6. Concluding remarks
  14. 2. The foundations of evidence in electronic form
    1. Direct and indirect evidence
    2. Evidence in both digital and analogue form
    3. Metadata and electronic evidence
    4. Means of proof
      1. Testimony and hearsay
      2. Real evidence
    5. Documents and disclosure or discovery
    6. Visual reading of a document
    7. Authentication
    8. Best evidence
    9. Analogue evidence
    10. Digital evidence
    11. Civil proceedings
    12. Criminal proceedings
    13. Admissibility
    14. Weight
    15. Video and audio evidence
      1. Testimonial use in legal proceedings
      2. Identification and recognition evidence
    16. Computer-generated animations and simulations
      1. Computer-generated evidence in England and Wales: civil proceedings
      2. Computer-generated evidence in England and Wales: criminal proceedings
  15. 3. Hearsay
    1. The rule of hearsay exclusion and its rationale
    2. The right of confrontation
    3. Hearsay and electronic evidence
    4. Electronic evidence and real evidence
    5. Testimonial and non-testimonial use of information
    6. Implied assertions
    7. Civil proceedings and the requirement to give notice
    8. Criminal proceedings
      1. Telephone calls and messages
      2. Representations other than by a person
      3. Body-worn camera footage
      4. Business and other documents
      5. Judicial discretion to include hearsay
      6. Judicial discretion to exclude hearsay
    9. Concluding observations
  16. 4. Software code as the witness
    1. The classification of digital data
      1. Category 1: Content written by one or more people
      2. Category 2: Records generated by the software that have not had any input from a human
      3. Category 3: Records comprising a mix of human input and calculations generated by software
    2. Challenging the code to test the truth of the statement
  17. 5. The presumption that computers are ‘reliable’
    1. The purpose of a presumption
    2. Presumptions and mechanical instruments
    3. Judicial formulations of the presumption that mechanical instruments are in order when used
      1. Judicial notice
      2. A ‘notorious’ class
      3. Common knowledge
    4. Evidential foundations of the presumption
    5. How judges assess the evidence of devices controlled by software
    6. Mechanical instruments and computer-like devices
    7. The nature of software errors
      1. Why software appears to fail
      2. Classification of software errors
    8. The development, maintenance and operation of software
      1. Developmental issues and software errors
      2. Increasing the risk of errors through modification of software
      3. Security vulnerabilities
      4. Software testing
      5. Writing software that is free of faults
      6. Software standards
      7. Summary
    9. Challenging ‘reliability’
      1. Aviation
      2. Financial products
      3. Motor vehicles
      4. Emergency services
      5. Medical
      6. The Post Office Horizon scandal
      7. Banking
      8. Interception of communications
    10. Most computer errors are either immediately detectable or result from input errors
    11. Challenging the authenticity of digital data – trial within a trial
      1. A protocol for challenging software in devices and systems
    12. Reintroduction of the common law presumption
    13. The statutory presumption
    14. Challenging the presumption
      1. ‘Working properly’
    15. Concluding remarks
  18. 6. Authenticating electronic evidence
    1. Authenticity and authentication
      1. An example: email
      2. Digital evidence compared to past paradigms
      3. Admissibility and authentication
      4. The best evidence rule
      5. Identity and integrity
      6. Reliability
    2. Methods of authentication
      1. Self-authentication
      2. System authentication
      3. Digital certification
      4. Digital forensics
      5. Extrinsic and circumstantial evidence
      6. Judicial notice
      7. Digital evidence in archival systems
    3. Technological authentication
      1. Digital signatures
      2. Blockchain
    4. Challenges to the authenticity of evidence in digital form
      1. The cloud
      2. The Internet of Things
      3. Digital preservation
      4. Migration and format changes
    5. The business records exception to the rule against hearsay
      1. The business records exception
      2. Authentication of digital business records
    6. Conclusion
  19. 7. Electronic signatures
    1. The purpose of a signature
    2. Dictionary definitions
    3. The manuscript signature
    4. Statutory definition of signature
    5. The functions of a signature
      1. The primary evidential function
      2. Secondary evidential functions
      3. Cautionary function
      4. Protective function
      5. Channelling function
      6. Record-keeping function
    6. Disputing a manuscript signature
      1. Defences
      2. Evidence of the manuscript signature
      3. Intention to authenticate and adopt the document
    7. The electronic signature
    8. Forms of electronic signature
      1. Authority, delegation and ratification
      2. Forged signatures
    9. Evidence of intent to sign
      1. The automatic inclusion of the signature
      2. Partial document with separate signature page
    10. The Electronic Communications Act 2000
      1. The definition of an electronic signature
      2. The elements of an electronic signature
      3. Liability of a certification service provider
      4. The power to modify legislation
      5. Regulation of Investigatory Powers Act 2000
    11. Electronic sound
    12. The ‘I accept’ and ‘wrap’ methods of indicating intent
      1. Click wrap
      2. Browse wrap
      3. ‘I accept’
    13. Personal Identification Number (PIN) and password
    14. Typing a name into an electronic document
      1. Acts by a lawyer as agent
      2. Interest in real property
      3. Loan of money
      4. Employment
      5. Contract
      6. Guarantees and debt
      7. Public administration, the judiciary and the police
      8. Statute of Frauds
      9. Wills
      10. Constitution of a legal entity
      11. Amending boilerplate contractual terms
    15. The name in an email address
      1. Limitation Act 1969 (NSW)
      2. Statute of Frauds
      3. Legal fees arrangement
      4. Civil Law Act
    16. A manuscript signature that has been scanned
      1. Mortgage redemption
      2. Writing
      3. Employment
    17. Biodynamic version of a manuscript signature
      1. Electoral register
      2. Contract formation
    18. Digital signatures
      1. Technical overview of digital signatures
      2. Algorithms and keys
      3. Control of the key
      4. Disguising the message
      5. Public key infrastructure
      6. Difficulties with public key infrastructure
      7. Authenticating the sender
      8. The ideal attributes of a signature in electronic form
      9. Methods of authentication
      10. Types of infrastructure for asymmetric cryptographic systems
      11. Management of the key and certificate
      12. The duties of a user
      13. Internal management of a certification authority
      14. Barriers to the use of the public key infrastructure
      15. Risks associated with the use of digital signatures
      16. What a digital signature is capable of doing
      17. What no form of electronic signature is capable of doing
      18. The weakest link
      19. The burden of managing the private key
      20. Evidence and digital signatures
      21. ‘Non-repudiation’
      22. Certifying certificates
      23. The burden of proof
      24. The recipient’s procedural and due diligence burden
      25. The sending party: the burden of proof of security and integrity
      26. Burden of proof – the jitsuin
      27. Burden of proof – summary
  20. 8. Encrypted data
    1. Encryption
    2. Methods to obtain encrypted data
      1. Breaking the encryption without obtaining the key
      2. Obtaining the key
    3. Compelling disclosure in England and Wales
      1. Protected information
      2. Notice requiring disclosure
      3. Obligations of secrecy and tipping off
      4. Circumventing the procedure
    4. The privilege against self-incrimination
      1. England and Wales
      2. The USA
      3. Canada
      4. Belgium
    5. Concluding observations
  21. 9. Proof: the technical collection and examination of electronic evidence
    1. Accreditation of the digital forensics discipline
    2. Guidelines for handling digital evidence
    3. Handling electronic evidence
      1. Identifying electronic evidence
      2. Gathering electronic evidence
      3. Gathering of data following legal retention or reporting obligations
      4. Copying electronic evidence
    4. Forensic triage
      1. Preserving electronic evidence
    5. Analysis of electronic evidence
      1. Tools
      2. Traces of evidence
    6. Reporting
    7. Analysis of a failure
    8. Anti-forensics and interpretation of evidence
      1. Data destruction
      2. Falsifying data
      3. Hiding data
      4. Attacks against computer forensics
      5. Trail obfuscation
    9. An intellectual framework for analysing electronic evidence
    10. Conclusions and future considerations
  22. 10. Competence of witnesses
    1. The need for witnesses
    2. Separating data reliability from computer reliability
    3. Lay experts as witnesses
    4. Qualification of witnesses
  23. Appendix 1: Draft Convention on Electronic Evidence
  24. Appendix 2: Cumulative vignettes
  25. Index

First published by LexisNexis Butterworths, 2007

Second edition published by LexisNexis Butterworths, 2010

Third edition published by LexisNexis Butterworths, 2012

Fourth edition published by the Institute of Advanced Legal Studies for the SAS Humanities Digital Library, School of Advanced Study, University of London, 2017

Fifth edition published by the Institute of Advanced Legal Studies for the SAS Humanities Digital Library, School of Advanced Study, University of London, 2021


Chapter 1 © Steven J. Murdoch, Daniel Seng, Burkhard Schafer and Stephen Mason, 2021; Chapter 2 © Stephen Mason and Daniel Seng, 2021; Chapter 3 © Daniel Seng and Stephen Mason, 2021; Chapters 4, 5, 7 and 10 © Stephen Mason, 2021; Chapter 6 © Luciana Duranti and Allison Stanfield, 2021; Chapter 8 © Alisdair Gillespie, Jessica Shurson and Stephen Mason, 2021; Chapter 9 © Nigel Wilson, Andrew Sheldon, Hein Dries, Burkhard Schafer and Stephen Mason, 2021; Chapter 10 © Stephen Mason and Lynne Townley; vignettes © Stephen Mason, 2007, 2010, 2012, 2016 and 2021.


Published under a CC BY-NC-ND 4.0 licence

The authors assert their rights under the Copyright, Designs and Patents Act 1988 to be identified as the authors of this work.


ISBN (HB): 978-1-911507-26-0

ISBN (print): 978-1-911507-22-2

ISBN (epub): 978-1-911507-23-9

ISBN (mobi): 978-1-911507-25-3

ISBN (web PDF): 978-1-911507-24-6


Institute of Advanced Legal Studies

University of London

Charles Clore House

17 Russell Square

London WC1B 5DR

http://ials.sas.ac.uk

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