Difference between pages "Global Positioning System" and "ID3"

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The '''Global Positioning System''' ('''GPS''') is a satellite navigation system.
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ID3 is a standard for encoding [[metadata]] into [[MP3]] files.
  
== Forensics ==
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== Header ==
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=== Version 1 ===
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ID3 version provides minimal information. The first 128 bytes of the file contain title, artist, album, year, genre and comment information. The [[header]] begins with the string "TAG".
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=== Version 2.xx ===
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ID3 Version 2+ is much more complicated than v1, and may contain a wide variety of information, including attached pictures, lyrics, encoding software, file owner and payment data. In practice, the most commonly used fields however tend only to list such information as album, artist and track details.
  
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].
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The header may be placed anywhere in the file, being preceded by the string "ID3".
  
[http://www.cortextech.com/tomtom910.jpg Picture of TomTom910]
 
 
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.
 
 
The TomTom unit connects to a computer via a USB base station. An examiner should be able to acquire the image of 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 a 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 [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.
 
  
 
== External Links ==
 
== External Links ==
 
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:* [http://www.id3.org ID3 Standard Homepage]
* [http://en.wikipedia.org/wiki/Global_Positioning_System Wikipedia: GPS]
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:* [http://id3lib.sourceforge.net/ id3lib], a widely-used open source C/C++ ID3 implementation.
 
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:* [http://www.vdheide.de/projects.html Java library MP3]
 
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:* [http://search.cpan.org/dist/MP3-Info/ MP3::Info] (Perl)
* [http://www.digivence.com Digivence: TomTom Forensic Analyser]
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:* [http://search.cpan.org/dist/MPEG-ID3v2Tag/ MPEG::ID3v2Tag] (Perl)
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:* [http://getid3.sourceforge.net/ getID3() - The PHP media file parser]

Revision as of 21:41, 16 March 2007

ID3 is a standard for encoding metadata into MP3 files.

Header

Version 1

ID3 version provides minimal information. The first 128 bytes of the file contain title, artist, album, year, genre and comment information. The header begins with the string "TAG".

Version 2.xx

ID3 Version 2+ is much more complicated than v1, and may contain a wide variety of information, including attached pictures, lyrics, encoding software, file owner and payment data. In practice, the most commonly used fields however tend only to list such information as album, artist and track details.

The header may be placed anywhere in the file, being preceded by the string "ID3".


External Links