Difference between pages "Global Positioning System" and "File Vault"

From ForensicsWiki
(Difference between pages)
Jump to: navigation, search
(Forensics)
 
 
Line 1: Line 1:
The '''Global Positioning System''' ('''GPS''') is a satellite navigation system.
+
File Vault is the cryptographic file system developed by [http://www.apple.com Apple] and introduced with MacOS 10.3.
  
== Forensics ==
+
File Vault works by storing each user's home directory in an encrypted "[[.sparseimage]]" file. The file is automatically mounted when the user logs in and unmounted when the user logs out. All of the user's files and preferences are stored in this file.  The file's encryption key is stored in the .sparseimage file, but that encryption key is itself encrypted with the user's login password.
  
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].
+
There are no known attacks against File Vault other than a brute force attack on the user's password.
  
[http://www.cortextech.com/tomtom910.jpg Picture of TomTom910]
+
As of OS X 10.5 (Leopard) Apple have moved from AES-128 to AES-256 for the encryption used in the disk image.
  
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.
+
=== Links ===
 
+
*You can find a good discussion of File Vault's usability shortcomings in [http://www.simson.net/thesis Simson Garfinkel's PhD Thesis].
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.
+
*[http://chaosradio.ccc.de/23c3_m4v_1642.html Unlocking FileVault] Talk at [http://events.ccc.de/congress/2006-static/static/2/3/r/23rd_Chaos_Communication_Congress_7c1f.html 23c3] (video)
 
+
*[http://chaosradio.ccc.de/23c3_mp3_1642.html Unlocking FileVault] Talk at [http://events.ccc.de/congress/2006-static/static/2/3/r/23rd_Chaos_Communication_Congress_7c1f.html 23c3] (audio)
=== 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 [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 ==
+
 
+
* [http://en.wikipedia.org/wiki/Global_Positioning_System Wikipedia: GPS]
+

Revision as of 04:39, 26 October 2007

File Vault is the cryptographic file system developed by Apple and introduced with MacOS 10.3.

File Vault works by storing each user's home directory in an encrypted ".sparseimage" file. The file is automatically mounted when the user logs in and unmounted when the user logs out. All of the user's files and preferences are stored in this file. The file's encryption key is stored in the .sparseimage file, but that encryption key is itself encrypted with the user's login password.

There are no known attacks against File Vault other than a brute force attack on the user's password.

As of OS X 10.5 (Leopard) Apple have moved from AES-128 to AES-256 for the encryption used in the disk image.

Links