Difference between pages "New Technology File System (NTFS)" and "Global Positioning System"

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The '''New Technology File System''' ('''NTFS''') is a [[file system]] developed and introduced by [[Microsoft]] in 1995 with [[Windows]] NT. As a replacement for the [[FAT]] file system, it quickly became the standard for [[Windows 2000]], [[Windows XP]] and [[Windows Server 2003]].
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The '''Global Positioning System''' ('''GPS''') is a satellite navigation system.
  
The features of NTFS include:
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== Forensics ==
  
* [[Hard-links]]
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There are several places where GPS information can found. It can be very useful for forensic investigations in certain situations. GPS devices have expanded their capabilites and features as the technology has improved. Some of the most popular GPS devices today are made by [http://www.TomTom.com TomTom]. Some of the other GPS manufacturors include [http://www.garmin.com Garmin] and [http://www.magellangps.com Magellan].
* Improved performance, reliability and disk space utilization
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* Security [[access control lists]]
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* File system journaling
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== Time Stamps ==
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TomTom provides a wide range of devices for biking, hiking, and car navigation. Depending on the capabilities of the model, several different types of digital evidence can be located on these devices. For instance, the [http://www.tomtom.com/products/product.php?ID=212&Category=0&Lid=1 TomTom 910] is basically a 20GB external harddrive. This model can be docked with a personal computer via a USB cable or through the use of Bluetooth technology. The listed features include the ability to store pictures, play MP3 music files, and connect to certain cell phones via bluetooth technology. Data commonly found on cell phones could easily be found on the TomTom910. Via the Bluetooth, the TomTom can transfer the entire contact list from your phone. The GPS unit also records your call logs and SMS messages. Research needs to be done to see if the TomTom stores actual trips conducted with the unit. This would include routes, times, and travel speeds.
  
NTFS keeps track of lots of time stamps. Each file has a time stamp for 'Create', 'Modify', 'Access', and 'Entry Modified'. The latter refers to the time when the MFT entry itself was modified. These four values are commonly abbreviated as the 'MACE' values. Note that other attributes in each MFT record may also contain timestamps that are of forensic value.
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The TomTom unit connects to a computer via a USB base station. An examiner should be able forensics acquire the harddrive through a USB write blocker. If not, it may be necessary to remove the hard drive from the unit.  
  
Additional information on how NTFS timestamps work when files are moved or copied is available here: [http://support.microsoft.com/kb/299648 Microsoft KB 299648]
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=== Digital Camera Images with GPS Information ===
  
=== Changes in Windows Vista  ===
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Some recent digital cameras have built-in GPS receivers (or external modules you can connect to the camera). This makes it possible for the camera to record where extactly an photo was taken. This positioning information (latitude, longitude) can be stored in the [[Exif]] [[metadata]] header of [[JPEG]] files. Tools such as [[jhead]] can display the GPS information in the [[Exif]] headers.
  
In Windows Vista, NTFS no longer tracks the Last Access time of a file by default. This feature can be enabled by the user if desired via setting the registry key 'HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\FileSystem\NtfsDisableLastAccessUpdate' to '0'.
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=== Cell Phones with GPS ===
  
== Alternate Data Streams ==
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Some recent cell phones (e.g. a [http://wiki.openezx.org Motorola EZX phone] such as the Motorola A780) have a built-in GPS receiver and navigation software. This software might record the paths travelled (and the date/time), which can be very useful in forensic investigations.
The '''NTFS''' file system includes a feature referred to as Alternate Data Streams (ADSs). This feature has also been referred to as "multiple data streams", "alternative data streams", etc.  ADSs were included in '''NTFS''' in order to support the resource forks employed by the Hierarchal File System ([[HFS]]) employed by Macintosh systems.
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As of [[Windows XP]] SP2, files downloaded via Internet Explorer, Outlook, and Windows Messenger were automatically given specific "zoneid" ADSs.  The [[Windows]] Explorer shell would then display a warning when the user attempted to execute these files (by double-clicking them).
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== External Links ==
  
Sysadmins should be aware that prior to Vista, there are no tools native to the [[Windows]] platform that would allow you to view the existence of arbitrary ADSs.  While ADSs can be created and their contents executed or viewed, it wasn't until the "/r" switch was introduced with the "dir" command on Vista that arbitrary ADSs would be visible.  Prior to this, tools such as [http://www.heysoft.de/Frames/f_sw_la_en.htm LADS] could be used to view the existence of these files.
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* [http://en.wikipedia.org/wiki/Global_Positioning_System Wikipedia: GPS]
 
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Examiners should be aware that most forensic analysis applications, including [[EnCase]] and ProDiscover, will display ADSs found in acquired images in red.
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== Advanced Format (4KB Sector) Hard Drives ==
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NTFS does not natively handle drives that use the new standard of 4KB sectors. For information on this, see [[Advanced Format]].
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== Transactional NTFS (TxF) ==
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According to [http://msdn.microsoft.com/en-us/library/bb968806%28v=VS.85%29.aspx MSDN] Transactional NTFS (TxF) allows file operations on an NTFS file system volume to be performed in a transaction.
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Several TxF related file-system-metadata files can be found in the file-system-metadata directory: \$Extend\$RmMetadata\. TxF also uses the MFT attribute $LOGGING_UTILITY_STREAM with the name $TXF_DATA.
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TxF uses the [http://msdn.microsoft.com/en-us/library/bb986747%28VS.85%29.aspx Common Log File System (CLFS)]
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== External links ==
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* [http://en.wikipedia.org/wiki/NTFS Wikipedia: NTFS]
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[[Category:Disk file systems]]
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Revision as of 22:42, 13 December 2006

The Global Positioning System (GPS) is a satellite navigation system.

Contents

Forensics

There are several places where GPS information can found. It can be very useful for forensic investigations in certain situations. GPS devices have expanded their capabilites and features as the technology has improved. Some of the most popular GPS devices today are made by TomTom. Some of the other GPS manufacturors include Garmin and Magellan.

TomTom provides a wide range of devices for biking, hiking, and car navigation. Depending on the capabilities of the model, several different types of digital evidence can be located on these devices. For instance, the TomTom 910 is basically a 20GB external harddrive. This model can be docked with a personal computer via a USB cable or through the use of Bluetooth technology. The listed features include the ability to store pictures, play MP3 music files, and connect to certain cell phones via bluetooth technology. Data commonly found on cell phones could easily be found on the TomTom910. Via the Bluetooth, the TomTom can transfer the entire contact list from your phone. The GPS unit also records your call logs and SMS messages. Research needs to be done to see if the TomTom stores actual trips conducted with the unit. This would include routes, times, and travel speeds.

The TomTom unit connects to a computer via a USB base station. An examiner should be able forensics acquire the harddrive through a USB write blocker. If not, it may be necessary to remove the hard drive from the unit.

Digital Camera Images with GPS Information

Some recent digital cameras have built-in GPS receivers (or external modules you can connect to the camera). This makes it possible for the camera to record where extactly an photo was taken. This positioning information (latitude, longitude) can be stored in the Exif metadata header of JPEG files. Tools such as jhead can display the GPS information in the Exif headers.

Cell Phones with GPS

Some recent cell phones (e.g. a Motorola EZX phone such as the Motorola A780) have a built-in GPS receiver and navigation software. This software might record the paths travelled (and the date/time), which can be very useful in forensic investigations.

External Links