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Archive for August, 2008

What is an Exhibit?

August 31st, 2008 by rob585 | No Comments | Filed in UK Law

An Exhibit is defined by the Ministry of Justice, in the Criminal Procedure Rules as being: “a document or thing presented as evidence in court”

In the Practice Directions for the Civil Procedure Rules (Part 34) it states that documents and exhibits must be produced in the following manner:

  • have an identifying number or letter marked on them by the
  • be preserved by the party or his legal representative who obtained examination, or as the court or the examiner may direct.

Interestingly there is no requirement for a “chain of custody” under UK law, however there is an expectation that the following procedures will be put in place:

  • use of evidence bags
  • chain of custody
  • safes/secure storage

The ACPO guidelines, also talk about exhibits and the important of handling procedures. While the ACPO guidelines are not law, and there is not a statutory requirement, for a chain of custody, it is expected that one will be provided.


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Videos: EnCase Videos

August 31st, 2008 by rob585 | No Comments | Filed in Encase, Video Guides

Below are links to “How To” guides of EnCase Videos. The Videos all made using EnCase 6.10 and are based on NTFS drives

Basic Keyword Searching

Analysing Slack

Partition Information in the MBR

Locating the MFT



 

 

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What is File Slack?

August 31st, 2008 by rob585 | 1 Comment | Filed in Encase, File System, Video Guides

What is File Slack?

This article looks at file slack, where it is, how to find it, and includes a video guide of how to view this data in EnCase 6.10

Requirements

To understand File Slack, one must first understand the basic concepts of Cluster and Sectors.

This article is based on the assumption that the reader understands these concepts. It is also written with the assumption that the hardware under consideration is a standard windows hard drive, with sector size of 512 and a cluster size of 8 sectors.

Clusters and Sectors

As the operating system can only address clusters, rather than sectors which hard drives can, it means that files are stored on a hard drive in units of clusters and not sectors.

Examples:

A 5000 byte file, takes up 9 sectors, however the operating system will allocate the file 2 clusters (16 sectors), as it does not fit into 1 sector. 2 Sectors is 8 KB

A 2500 byte file will fit into 5 sectors, however the operating system will allocate the file 1 full cluster (8 sectors), which is 4 KB

A file which is 10,000 bytes will be allocated 12 KB – 3 sectors.

Different Sizes

From this it can be seen that a file has two different sizes, the logical file size the actual size of the file and the physical file size, the size given to the file on the hard drive.

The physical file size is always greater than or equal to the logical file size (ignoring resident data for the moment).

File Slack

File slack is the difference between the physical file size and logical file size.

E.g for a 5000 byte file, which is given 2 clusters (8192 bytes), the file slack will be 8192 – 5000, which is 3192 bytes. The file slack should always be less than 1 cluster (4096 bytes).

As file slack is literally the space on the hard drive between the logical and physical file size, it means that anything that was in that space before become file slack. As a new file is created by overwriting unallocated space (even if it means deleting a file immediately before the request to write) this means that file slack is essentially old fragments of unallocated file space (RAM slack is not being discussed at this point).

This means that file slack can contain anything at all, from fragments of web pages, emails, and even complete small pictures, to junk text. It is more often than not the latter, however complete EML files, and thumbnail pictures have been recovered than can prove an entire case.

Below is a video showing file slack, using EnCase 6.10. Encase is better at viewing this type of data than FTK.

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LTO Technical Details

August 31st, 2008 by rob585 | No Comments | Filed in Tapes

LTO (Linear Tape-Open) is a tape standard developed by HP, IBM, and Seagate as a competitor to DLT.

A standard LTO tape stores data in 384 data tracks, which are in turn divided into 4 data bands of 96 tracks each. The data bands are filled one-at-a-time, in a linear fashion.

LTO tapes contain 4KB of non-volatile memory; this storage space contains data about the tape and can be read without the time required to read the magnetic tape itself.

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EnCase Forensic 6: Review

August 31st, 2008 by rob585 | 1 Comment | Filed in Encase, Tools

Encase Forensic, produced by Guidance, is currently on version 6.11 (at the time of publishing). Version 6 was first released in late 2006.

Version 6 has attempted to gain market share in the areas EnCase 5.x could not handle previously – namely email handing and indexing.

Guidance have done this by adding Stellant at the backend, to try an handle compound files and indexing better. Stellant is used by many other tools, not least of which is FT - the arch rival of Guidance

The first versions of EnCase Forensic 6.x, simply did not do what it said on the tin. Attempting to use the indexing feature was utterly futile, cases crashed, time was wasted and and anyone who paid for the upgrade to EnCase 6.0 no doubt felt cheated, again. To be fair the launch of EnCase 6.0 was better than appalling launch of FTK 2.0 (it could hardly be worse). But even Encase 6.11 still does not have the simplicity of use that FTK 1.x has (in relation to indexing emails)

But, Guidance are nothing if not consistent. Regular users of Guidance Software know that the first few versions of EnCase are never going to be stable, they will have bugs and flaws in them, which we, the customers, are the beta testers for.

By EnCase 6.10 the product had started to become far more stable, emails could be expanded and searched – though not through indexing (I would leave this to EnCase Version 7)

The scripts and case processor is effective and easy to work with, but the registry viewer is still poor compared to “Registry Viewer” by Access Data, which came as standard with FTK 1.0.

The disk view, transcript view, record view, search hit view, book marks view, entries view, etc,  are all individually well presented; however the huge array of views can be confusing.

Overall EnCase 6.x is better than EnCase 5.x, though it isn’t as good as the marketing says it is.

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Elecotronic Disclosure- Case Law

August 31st, 2008 by rob585 | No Comments | Filed in UK Law

Below are case laws that related to disclosure, under the Civil Procedure Rules, Part 31

When is a document relevant?

  • CPR 31.6 defines which documents should be disclosed
  • Rowley v Liverpool City Council (1989) (comparative earnings)
  • Loutchansky v Times Newspapers (2002) (statement of disclosure is conclusive)
  • Marlton v Tektronix UK Holdings Ltd 2003) (disclosure of backups tapes and servers)
  • Paddick v Associated Newspaper Ltd (2003) (documents relevance determined by statements of the case,and nothing else)
  • Atos Consulting Ltd v Avis plc (2007) (redaction allowed)

Duty to Search

Preservation and Disclosure of all Documents

  • Rockwell Machine Tool Co Ltd v E P Barrus
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UK police uncover global online paedophile network

August 31st, 2008 by rob585 | 1 Comment | Filed in Uncategorized

Police today [8th August] revealed that an international paedophile network has been infiltrated by law enforcement officers and dozens of suspects arrested.

The operation was run jointly by the Child Exploitation and Online Protection (CEOP) Centre, Cleveland Police and the Metropolitan Police Service (MPS).

The investigation involved the largest ever coordinated deployment of undercover officers in the UK within a child protection investigation.

The announcement came as a 27 year old Teesside man was sentenced to an indeterminate public protection sentence for his part in the network, which has so far identified over 360 suspects worldwide. More than 130 of these suspects are in the UK, resulting in over 50 arrests to date.

15 children have been safeguarded in the UK as a result of this ongoing investigation.

Philip Anthony Thompson, unemployed and from the Stockton-on-Tees area of Cleveland, was charged with 27 counts in total including causing or inciting a child under 13 to engage in sexual activity, taking indecent photographs of a child and making and distributing child abuse images.  Approximately a quarter of a million child abuse images, still and moving and ranging from levels 1-5*, were discovered in Thompson’s possession.

Source and Full Story

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Computer Forensic University Courses

August 30th, 2008 by rob585 | 2 Comments | Filed in Forensics

Following on from the previous post on Computer Forensics Courses, below is a list of the current university courses with places available, in the UK. (Correct at the time of publishing)

Attached is spreadsheet highlighting the position of the universities providing Computer Forensics courses according to the Guardian League Table. Another useful resource for University league tables is the Times

Books

For those going starting on a computer forensics course, with the intention of going into the industry, the following books may be of interest:

Digital Evidence and Computer Crime by Eoghan Casey. A good book, though dated now, the author writes well and so its easy to read.

Malware Forensics - another book by Eoghan Casey, but one that focuses on “malware”. Good for those studying the Trojan defence and who want to go into a law enforcement/criminal work, not really for those in the civil sector, unless they have a very specific case they want to investigate.

A good resource on file system -  for the students who want to know what is going at the low level - is File System Forensic Analysis

Courses

A60 - Anglia Ruskin University: 0845 2713333
Information Security and Forensic Computing 3   DEG FT GG4N C

B22 - University of Bedfordshire: 0800 013 0925
Computer Security and Forensics 3   DEG FT GF44 D

B50 - Bournemouth University: 01202 524111
Forensic Computing and Security 4   DEG SW G550 -
Software Systems Framework 3   DEG FT G603 -

B56 - The University of Bradford: 0800 073 1225
Computer Systems Administration (4 years) 4   DEG SW G531 -

B80 - University of the West of England, Bristol: 0117 32 83333
Forensic Computing 3   DEG FT GF54 -

C10 - Canterbury Christ Church University: 01227 782900
Forensic Computing 3   DEG FT FG45 -
Forensic Computing ”International Only” 4   DEG FT FG4M -

C25 - Birmingham City University (was UCE Birmingham): 0121 331 6777
Forensic Computing 3   DEG FT FG44 -

C30 - University of Central Lancashire: 01772 201201
Forensic Computing 3   DEG FT GF44 U

C85 - Coventry University: 02476 791 791
Digital Forensics and System Security 4   DEG SW G550 -
Ethical Hacking and Network Security 4   DEG SW GG45 -

D26 - De Montfort University: 08459 454647
Forensic Computing 4   DEG SW FG45 Y

D39 - University of Derby: 01332 621300
Computer Forensics and Security 4   DEG SW G550 -
Computer Networks and Forensic Studies 3   DEG FT GF44 -
Computing Management and Forensic Studies 3   DEG FT GF4K -

H60 - The University of Huddersfield: 01484 472777
Secure and Forensic Computing 3   DEG FT G603 -

K84 - Kingston University: 0844 855 2177
Forensic Science and Web Development 4   DEG SW FG4K -
Cyber Security - Computer Forensics with Maths 3   DEG FT G4G1 -
Cyber Security - Computer Forensics with Stats 3   DEG FT G4G3 -
Cyber Security - Comp Forensics w Maths inc yr 0 5   DEG SW G4GA K
Cyber Security - Comp Forensics w Stats inc yr 0 5   DEG SW G4GB K
Cyber Security - Computer Forensics with Maths 4   DEG SW G4GC -
Cyber Security - Comp Forensics w Maths inc yr 0 4   DEG FT G4GD K
Cyber Security - Computer Forensics with Stats 4   DEG SW G4GH -
Cyber Security - CompForensics w Stats inc yr 0 4   DEG FT G4GJ K
Cyber Security - Computer Forensics with Bus 3   DEG FT G4N1 -
Strategic Inn w Cyber Sec - Comp Frns (Int only) 4   DEG FT G596 K
Cyber Sec - Comp Forensics w Maths (Intntl only) 4   DEG FT G5GC K
Cyber Security - Comp Forensics/Stats (Int only) 4   DEG FT G5GH K
Cyber Sec - Comp Forensics/Strategic Innovation 4   DEG FT G5N2 K
Cyber Security - CompForensics w Bus (int only) 4   DEG FT G5NB K
Cyber Sec - Comp Forensics/Strategic Innovation 3   DEG FT G5NF -
Cyber Security - Comp Forensics/Strategic Innov 4   DEG SW G5NG -

L51 - Liverpool John Moores University: 0500 564565
Computer Forensics 4   DEG SW G550 -

M40 - The Manchester Metropolitan University: 0800 915 0668
Forensic Computing 4   DEG SW G550 -
Forensic Computing 3   DEG FT G551 -
Forensic Computing (Foundation) 4   DEG FT G552 -

M80 - Middlesex University: 020 8411 6565
Forensic Computing with Foundation Year 4   DEG FT GF5K H

N07 - Napier University: 08452 606040
Computer Security - Forensics 3   DEG FT GG56 -

N37 - University of Wales, Newport: 01633 435000
Forensic Computing 3   DEG FT G550 -

P80 - University of Portsmouth: 023 9284 8000
Security Technology 3   DEG FT L435 -

S21 - Sheffield Hallam University: 0845 147 3503
Forensic and Security Technologies 3   DEG FT G550 -
Forensic and Security Technologies 2   DEG FT G551 -

S72 - Staffordshire University: 0800 590 830
Forensic Computing 2   HND FT 44FG -
Digital Interactive Television Production 3   DEG FT EP23 -
Forensic Computing 3   DEG FT FG44 -
Forensic Computing 4   DEG FT FGK4 -
Forensic Computing (Bridge) 2   DEG FT G552 -
Forensic Computing and Forensic Engineering 3   DEG FT GF94 -
Computer Graphics and Forensic Computing 3   DEG FT GG49 -
Business and Forensic Computing 3   DEG FT GG59 -
Forensic Computing - Applied Statistics 3   DEG FT GG5H -
Computer Games Programming and Forensic Comp 3   DEG FT GG69 -
Forensic Computing and Mathematics 3   DEG FT GG91 -
Forensic Computing and Internet Technology 3   DEG FT GG94 -
Forensic Computing and Information Systems 3   DEG FT GG95 -
Forensic Computing and Software Engineering 3   DEG FT GG96 -
Forensic Computing and Network Engineering 3   DEG FT GG9K -
Forensic Computing and Web Media Technology 3   DEG FT GGXL -
Forensic Computing and Mechanical Engineering 3   DEG FT GH93 -
Forensic Computing and Mobile Communications 3   DEG FT GH96 -
Forensic Computing and Robotics Technology 3   DEG FT GH9P -
Forensic Computing and Music Technology 3   DEG FT GJ99 -
Forensic Computing and Sports Technology 3   DEG FT GJ9X -
Automotive Technology and Forensic Computing 3   DEG FT HG39 -
Aeronautical Technology and Forensic Computing 3   DEG FT HG49 -
Broadcasting Technology and Forensic Computing 3   DEG FT HG69 -
Electronics and Forensic Computing 3   DEG FT HGP9 -
Electronic Commerce and Forensic Computing 3   DEG FT NG19 -
Computer Games Design and Forensic Computing 3   DEG FT WG29 -
Film Production Technology and Forensic Comp 3   DEG FT WG69 -
Design Technology and Forensic Computing 3   DEG FT WGF9 -

S84 - University of Sunderland: 0191 515 3000
Forensic Computing 3   DEG FT FG45 -

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Photography - Is it a crime?

August 30th, 2008 by rob585 | 5 Comments | Filed in UK Law

When did public photography become a crime?

There are an increasing number of reports of photographers getting arrested for doing their job/hobby. Many of these arrests appear absurd, if not illegal.

Previously there has been the creation of the ACPO Guidelines for Media/Press, and more recently there has been meetings with “some” press and the Met Police, though most of the main bodies representing photographers were not there.

In addition to the commentary in the trade magazines, there has been commentary in more mainstream publications, e.g TelegraphBBC.

Despite this, there does not appear to any national outcry or urge for change.

Below are examples of photographers taking pictures and getting arrested. Though some of these people appear to be completely innocent, others have pushed the boundaries of decency too far – e.g a photographer taking his 16 year old daughter to watch a suicide attempt.

The phrase “You can not have rights without responsibilities” applies here

Why are photographers not willing to have a “gentlemens” agreement with the police to hide the faces of anti-terrorist police officers, surely this is not unreasonable?

Equally why are the police allowed to threaten and arrest innocent people, without censure?

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“I” v Finland - Data Protection and Privacy

August 30th, 2008 by rob585 | 3 Comments | Filed in Data Loss, Data Misuse

Results:

On 17th July 2008, at the ECHR (Strasbourg), in the case “I” v Finland the court found against Finland, and awarded  “I” €13,771 in damages and €20,000 in costs. The full court decision,  I v. FINLAND, case no. 20511/03, is available here.

Outline of the Case:

The applicant “I”, now 48, stated that her private medical records were accessed by the other people (as a result of which she possibly lost her job as a nurse).

The access was not recorded, as there was no records of this at the time (around 1992)

The Court decided that as the hospital was controlled by the State, and as such Finland was responsible for the actions there. The court also stated that personal information relating to a patient undoubtedly belongs to his or her private life. Therefore  Article 8, freedom to a private life, is applicable in this case.

The European Court of Human Rights found that a person’s right to respect for their private life (under the ECHR,) may be breached where the State fails to take appropriate steps to secure data, so that it cannot be accessed improperly.

While Article 8 not means the government must not interfere, but may also have to undertake positive actions to prevent such interference, e.g the adaption of systems/controls to protect data.

In this case there is no statement that there was deliberate and unauthorized access of data, only that there was failure to secure the data appropriately. i.e a breach of Finland’s positive obligations under Article 8. The court found in favour of the Applicant.

Summary: The ECHR found that if personal data is not secured adequately, and the State does not take positive steps to do so (and not just legislation but technical and procedural steps as well), then the state is in breach of Article 8.

Background of the Case:

The claimant “I” was a nurse who worked in Finland, and between 1989 and 1994 she worked on fixed terms contracts in a state/public hospital (i.e working for Finland). However, from 1987 onwards “I” had also been a patient of the same hospital as she had been diagnosed with HIV.

In Early in 1992 the applicant began to suspect that her colleagues were aware of her illness. At that time hospital staff had free access to the patient register which contained information on patients’ diagnoses and treating doctors. Having confided her suspicions to her doctor in summer 1992, the hospital’s register was amended so that henceforth only the treating clinic’s personnel had access to its patients’ records. The applicant was registered in the patient register under a false name. Apparently later her identity was changed once again and she was given a new social security number.

In 1995 the applicant, “I” changed/lost her job as her temporary contract was not renewed.

On 25 November 1996, the applicant complained to the County Administrative Board (lääninhallitus, länsstyrelsen) in Finland, requesting it to examine who had accessed her confidential patient record.  Following this request, the director in charge of the hospital’s archives provided a formal statement with the County Administrative Board. The statement said that is was not possible to find out who, if anyone, had accessed the applicant’s patient record as the data system revealed only the five most recent consultations  - and this was by department and not a named individual. And even this scant information was deleted when the records were returned to the archives.

Following this investigation the Finnish County Administrative Board decided, on 20 October 1997 that while there should be privacy for the individual the records are not detailed and therefore Board decided that it could not further rule on whether information had been viewed inappropriately. However, it did advise the records should be changed so that access to the files are recorded.

As a result of this, in March 1998, the hospital’s register was amended so that it became possible retrospectively to identify any person who had accessed a patient record.

In 15 May 2000, the applicant “I” instituted civil proceedings against the District Health Authority (sairaanhoitopiirin kuntayhtymä, samkommunen för sjukvårdsdistriktet), which was responsible for the hospital’s patient register at the time of the incident, claiming non-pecuniary and pecuniary damage for the alleged failure to keep her patient record confidential.

On 10 April 2001, the District Court (käräjäoikeus, tingsrätten) rejected the action.  The applicant then appealed to the Court of Appeal (hovioikeus, hovrätten), maintaining her claim that the hospital had not complied with the domestic law, in breach of her right to respect for her private life

On 7 March 2002, the Court of Appeal, found against the applicant and ordered her to pay costs for the respondents legal expenses for both the district court and appeals court – 2,000 and 3271 euros  respectively.

Following this “I”, then applied to the Finish Supreme Court (korkein oikeus), claiming that there been a violation of her right to respect for her private life. On 23rd Decemeber 2002 the Supreme Court refused leave to appeal.

Still pursuing the case “I” applied to the ECHR and requested that her name was with held. On  20th June 2003 the president of the Chamber (Nicolas Bratza) agreed to this. On 19th January 2006 the ECHR decided that there was a case to hear and informed Finland that the ECHR would hear the case.

On 17th July 2008 the court decided in favour of the applicant “I”.

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