Difference between pages "Microsoft PocketPC" and "SIM Cards"

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[[Image:Simpic.jpg|thumb|A typical SIM card.]]
  
=Overview=
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== SIM-Subscriber Identity Module ==
A PocketPC is commonly referred to as a handheld computer that runs a version of Microsoft’s proprietary mobile operating systems.
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[[Image:Pocketpc.jpg|thumb|Acer PocketPC]]
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The UICC (Universal Integrated Circuit Card) is a smart card which contains account information and memory that is used to enable GSM cellular telephones.  One of the applications running on the smart card is the SIM, or Subscriber Identity Module. In common parlance the term "UICC" is not used an the phrase "SIM" is used to describe the smart card itself.
  
Microsoft PocketPC, sometimes referred to as P/PC or PPC, is based upon the Windows CE framework.  Variants of this operating system include versions such as PocketPC 2000, PocketPC 2002, Windows Mobile 2003/2003 SE, and Windows Mobile 5.0. Variants also exist for [[SmartPhones]], such as Windows Mobile 2003 Smartphone edition.
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Because the SIM is just one of several applications running on the smart card, a given card could, in theory, contain multiple SIMs. This would allow multiple phone numbers or accounts to be accessed by a single UICC. This is seldom seen, though there is at least one "12-in-1" SIM card being advertised at present.
  
One of the key benefits of Microsoft's Windows Mobile platform is file format compatibility with the desktop versions of the company's productivity softwareMobile versions of Microsoft software, such as Pocket Word, Pocket Excel, and Pocket PowerPoint, allow individuals to view and edit these files outside of the home and office.  
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Early versions of the UICC used full-size smart cards (85mm x 54mm x 0.76mm)The card has since been shrunk to the standard size of 25mm x 15mm x 0.76mm.
  
Another benefit is integration with Microsoft's cross-platform solution, the .NET Framework.  The .NET Framework and its associated class libraries handle things such as memory management, file I/O, and many other functions.  The .NET Framework allows programmers to develop code in one of several .NET languages, such as C# and VB.NET.  PocketPCs run a simplified version of the framework called the .NET Compact Framework.
 
  
In order to maintain synchronization and connectivity with desktop computers, Microsft developed the ActiveSync program.  The user merely has to connect the PocketPC to the desktop computer in order to synchronize items such as appointments, contact lists, and even multimedia files.
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Although UICC cards traditionally held just 16 to 64KB of memory, the recent trend has been to produce SIM cards with larger storage capacities, ranging from 512MB up to [http://www.m-systems.com/site/en-US/ M-Systems'] 1GB SIM Card slated for release in late 2006.
  
In 2001, PDAs running Palm OS variants held a market share of about 72%, while PocketPC held a meager 15% of the market.  However, by the fourth quarter of 2004, Microsoft PocketPC and Palm OS were practically tied with regards to market share -- PocketPC-based devices had a market share of 40.2% while Palm OS claimed 40.7% of the market.  This upward trend clearly illustrates the growing popularity of PocketPC-based devices, and thus the increased likelihood that one will encounter such a device in the field.
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== SIM Security ==
  
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Information inside the UICC can be protected with a PIN and a PUK.
  
== History ==
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The PIN (Personal Identification Number) is a code that locks access to the SIM. Not all SIMs have PINs; if a SIM has a PIN, the PIN must be entered to unlock the SIM.
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PUK (Personal Unlocking Code) codes are provided by the network provider to unlock a code.  If the PUK is incorrectly put in 10 times the SIM card will be permanently locked.
  
The PocketPC operating system began as Windows CE in November of 1996.  The NEC MobilePro 200 and the Casio A-10 were the first two PDA-type devices available with this early version of the operating system.  From here, Windows CE continued in development through versions 2 (with such devices as the MD Elan SC400, DEC SA1100, Hitachi SuperH 3, NEC VR4101, Philips DR 31500, and the Toshiba TX3912).
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== SIM Forensics ==
  
=PocketPC Variants=
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The data that a SIM card can provide the forensics examiner can be invaluable to an investigation. Acquiring a SIM card allows a large amount of information that the suspect has dealt with over the phone to be investigated.
As previously noted, there exist many variants of the PocketPC operating system. Below are a summary of each.
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==PocketPC 2000==
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In general, some of this data can help an investigator determine:
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* Phone numbers of calls made/received
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* Contacts
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* [[SMS]] details (time/date, recipient, etc.)
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* SMS text (the message itself)
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* Picture (if there is a camera)
  
PocketPC 2000, based on Micrsoft's Windows CE 3.0 platform, was a first step towards the familiar appearance and functionality that is offered by Windows Mobile 5.0.  Devices running PocketPC 2000 ranged from the Askey PC010, which had a 16-color grayscale screen with no expansion slots, to the Casio EM-500, which had a 64k color screen and provisions for upgraded pheripherals such as cameras. PocketPC 2000 launched with versions of Pocket Word, Pocket Excel, and Microsoft Reader bundled. ActiveSync 3.1, which provided an easier way to install applications onto the PocketPC, was required to synchronize with host desktop machines.
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There are many software solutions that can help the examiner to acquire the information from the SIM card. Several products include 3GForensics SIMIS [http://www.3gforensics.co.uk/products.htm], Inside Out's [http://simcon.no/ SIMCon], or SIM Content Controller, and Paraben Forensics' [http://www.paraben-forensics.com/catalog/product_info.php?products_id=289 SIM Card Seizure].
  
==PocketPC 2002==
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The SIM file system is hierarchical in nature consisting of 3 parts:
Codenamed "Merlin," PocketPC 2002 was Microsoft's Windows CE 3.0-based upgrade to PocketPC 200.  PocketPC 2002 offered many improvements over the previous operating system, including a Terminal Service Client, a new mail Inbox, Windows Media Player 8.0, improved versions of Pocket Word and MS Reader, and many other features. 
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*Master File (MF) - root of the file system that contains
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DF’s and EF’s
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*Dedicated File (DF)
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*Elementary Files (EF)
  
There were three service packs (EUUU1/2/3) released which addressed bugs and other issues in the original release.
 
  
==Windows Mobile 2003/SE==
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=== Data Acquisition ===
Based on the Windows CE.Net operating system, Windows Mobile 2003 for Pocket PC includes a Windows-like graphical user interface (GUI), tools and helper apps, and several companion applications, including Pocket Word and Pocket Excel. It's the third major release of the platform, which debuted in April 2000 and was last updated in October 2001
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Here's a list of Windows Mobile 2003 for Pocket PC's new features:  
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These software titles can extract such technical data from the SIM card as:
  
-- Enhanced Connection Manager user interface
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* '''International Mobile Subscriber Identity (IMSI)''': A unique identifying number that identifies the phone/subscription to the [[GSM]] network
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* '''Mobile Country Code (MCC)''': A three-digit code that represents the SIM card's country of origin
-- Zero Configuration connections
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* '''Mobile Network Code (MNC)''': A two-digit code that represents the SIM card's home network
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* '''Mobile Subscriber Identification Number (MSIN)''': A unique ten-digit identifying number that identifies the specific subscriber to the GSM network
-- Improved animated connectivity status icons
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* '''Mobile Subscriber International ISDN Number (MSISDN)''': A number that identifies the phone number used by the headset
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* '''Abbreviated Dialing Numbers (ADN)''': Telephone numbers stored in sims memory
-- Improved connectivity bubbles
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* '''Last Dialed Numbers (LDN)'''
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* '''Short Message Service (SMS)''': Text Messages
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* '''Public Land Mobile Network (PLMN) selector'''
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* '''Forbidden PLMNs'''
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* '''Location Information (LOCI)'''
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* '''General Packet Radio Service (GPRS) location'''
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* '''Integrated Circuit Card Identifier (ICCID)'''
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* '''Service Provider Name (SPN)'''
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* '''Phase Identification'''
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* '''SIM Service Table (SST)'''
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* '''Language Preference (LP)'''
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* '''Card Holder Verification (CHV1) and (CHV2)'''
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* '''Broadcast Control Channels (BCCH)'''
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* '''Ciphering Key (Kc)'''
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* '''Ciphering Key Sequence Number'''
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* '''Emergency Call Code'''
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* '''Fixed Dialing Numbers (FDN)'''
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* '''Forbidden PLMNs'''
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* '''Local Area Identitity (LAI)'''
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* '''Own Dialing Number'''
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* '''Temporary Mobile Subscriber Identity (TMSI)'''
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* '''Routing Area Identifier (RIA) netowrk code'''
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* '''Service Dialing Numbers (SDNs)'''
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* '''Service Provider Name'''
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* '''Depersonalizatoin Keys'''
  
-- Always-on Bluetooth discoverability
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This information can be used to contact the service provider to obtain even more information than is stored on the SIM card.
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-- Use of Bluetooth modems
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-- Bluetooth beaming
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== USIM-Universal Subscriber Identity Module ==
  
-- Auto-correct spelling
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A Universal Subscriber Identity Module is an application for UMTS mobile telephony running on a UICC smart card which is inserted in a 3G mobile phone. There is a common misconception to call the UICC card itself a USIM, but the USIM is merely a logical entity on the physical card.
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-- Auto-suggest in Inbox
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-- One-touch turn all radios off
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It stores user subscriber information, authentication information and provides storage space for text messages and phone book contacts. The phone book on a UICC has been greatly enhanced.
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-- 802.1x support
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-- Certificate Management UI
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For authentication purposes, the USIM stores a long-term preshared secret key K, which is shared with the Authentication Center (AuC) in the network. The USIM also verifies a sequence number that must be within a range using a window mechanism to avoid replay attacks, and is in charge of generating the session keys CK and IK to be used in the confidentiality and integrity algorithms of the KASUMI block cipher in Universal Mobile Telecommunications System (UMTS).
  
-- IPSec/L2TP
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In Mobile Financial Services, USIM seems to be a mandetory Security Element for user authentication, authorization and stored credentials. With the integration of NFC Handset and USIM, users will be able to make proximity payments where the NFS handset enables contactless payment and USIM enables independent security element.
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This is the evolution of the SIM for 3G devices. It can allow for multiple phone numbers to be assigned to the USIM, thus giving more than one phone number to a device.
  
-- Support for Multiple VPNs
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== Service Provider Data ==
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-- IPv6 support
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-- New Today screen
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-- Smart Lookup in Contacts
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-- Windows CE 4.2 operating systems
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-- .NET Compact Framework
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-- Enhanced developer support
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-- 128-bit encryption strength for Crypto API
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-- Improved power management
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-- Windows Media Player 9 Series for Pocket PC 2003
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-- Plus! Sync & Go
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-- Support for Plus! Photo Story
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Some additional information the service provider might store:
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-- Windows Movie Maker 2
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-- Pictures
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* A customer database
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* [[Call Detail Record]]s (CDR)
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* [[Home Location Register]] (HLR)
  
-- New version of Pocket Internet Explorer
 
 
-- "Jawbreaker" game
 
 
-- vCard and vCal support
 
  
-- Inbox signature support
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== Service Providers that use SIM Cards in the United States ==
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* T-Mobile
-- New user notifications
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* Cingular/AT&T
  
==Windows Mobile 5.0==
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== Sim Card Text Encoding ==
Windows Mobile 5.0, based off of Windows CE 5.0, was released on May 10, 2005.  Windows Mobile 5.0 brought many changes to the PocketPC landscape.  For one, with this release, the phone and PDA versions of the OS have merged into one encompassing OS, instead of two separate versions of the same one.  Additionally, while past versions of PocketPC software utilized the RAM of a PDA for program and data storage, Windows Mobile 5.0 uses a PDA's hardware more like a traditional computer.  The operating system and user data is stored in the more persistent ROM of the device, and RAM is used in a way more similar to that of a desktop PC.  This has implications for forensics, as data stored on these devices is now less volatile.
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=Pocket PC Devices=
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Originally the middle-European [[GSM]] network used only a 7-bit code derived from the basic [[ASCII]] code. However as GSM spread worldwide it was concluded that more characters, such as the major characters of all living languages, should be able to be represented on GSM phones. Thus, there was a movement towards a 16-bit code known as [[UCS-2]] which is now the standard in GSM text encoding. This change in encoding can make it more difficult to accurately obtain data form [[SIM cards]] of the older generation which use the 7-bit encoding. This encoding is used to compress the hexadecimal size of certain elements of the SIMs data, particularly in [[SMS]] and [[Abbreviated Dialing Numbers]].
In recent years, a number of manufacturers have elected to produce PocketPC devices. Some of these makers include companies such as:
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*  Acer
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== References ==
*  Asus
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*  Audiovox
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*  Dell
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*  HP
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*  Mitac
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*  Motorola
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*  Samsung
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*  Siemens
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*  Symbol
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*  Treo
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Because different manufacturers are targeted at different segments of the market, such as business and consumers, the features and functionality of these devices sometimes differ greatly. For example, some devices have built-in capability for taking images and videos, while other devices have tools such as biometric fingerprint readers and barcode scanners.
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* [http://www.simcon.no/ SIMCon]
 
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* [http://www.sectorforensics.co.uk/sim-examination.shtml Sector Forensics]
 
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* [http://www.utica.edu/academic/institutes/ecii/ijde/articles.cfm?action=issue&id=5  IJDE Spring 2003 Volume 2, Issue 1 ]: [http://www.utica.edu/academic/institutes/ecii/publications/articles/A0658858-BFF6-C537-7CF86A78D6DE746D.pdf Forensics and the GSM Mobile Telephone System] (PDF)
 
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* http://en.wikipedia.org/wiki/Subscriber_Identity_Module
 
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'''References:'''
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----
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[http://www.hpcfactor.com/support/windowsce/ The History of Microsoft Windows CE]
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[http://palmtops.about.com/cs/pdafacts/a/Palm_Pocket_PC.htm Palm vs. Pocket PC-The Great Debate]
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[http://www.windowsfordevices.com/news/NS8063885791.html Gartner: Windows CE ties Palm]
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[http://en.wikipedia.org/wiki/Pocket_PC PocketPC]
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Revision as of 08:44, 24 September 2008

A typical SIM card.

SIM-Subscriber Identity Module

The UICC (Universal Integrated Circuit Card) is a smart card which contains account information and memory that is used to enable GSM cellular telephones. One of the applications running on the smart card is the SIM, or Subscriber Identity Module. In common parlance the term "UICC" is not used an the phrase "SIM" is used to describe the smart card itself.

Because the SIM is just one of several applications running on the smart card, a given card could, in theory, contain multiple SIMs. This would allow multiple phone numbers or accounts to be accessed by a single UICC. This is seldom seen, though there is at least one "12-in-1" SIM card being advertised at present.

Early versions of the UICC used full-size smart cards (85mm x 54mm x 0.76mm). The card has since been shrunk to the standard size of 25mm x 15mm x 0.76mm.


Although UICC cards traditionally held just 16 to 64KB of memory, the recent trend has been to produce SIM cards with larger storage capacities, ranging from 512MB up to M-Systems' 1GB SIM Card slated for release in late 2006.

SIM Security

Information inside the UICC can be protected with a PIN and a PUK.

The PIN (Personal Identification Number) is a code that locks access to the SIM. Not all SIMs have PINs; if a SIM has a PIN, the PIN must be entered to unlock the SIM. PUK (Personal Unlocking Code) codes are provided by the network provider to unlock a code. If the PUK is incorrectly put in 10 times the SIM card will be permanently locked.

SIM Forensics

The data that a SIM card can provide the forensics examiner can be invaluable to an investigation. Acquiring a SIM card allows a large amount of information that the suspect has dealt with over the phone to be investigated.

In general, some of this data can help an investigator determine:

  • Phone numbers of calls made/received
  • Contacts
  • SMS details (time/date, recipient, etc.)
  • SMS text (the message itself)
  • Picture (if there is a camera)

There are many software solutions that can help the examiner to acquire the information from the SIM card. Several products include 3GForensics SIMIS [1], Inside Out's SIMCon, or SIM Content Controller, and Paraben Forensics' SIM Card Seizure.

The SIM file system is hierarchical in nature consisting of 3 parts:

  • Master File (MF) - root of the file system that contains

DF’s and EF’s

  • Dedicated File (DF)
  • Elementary Files (EF)


Data Acquisition

These software titles can extract such technical data from the SIM card as:

  • International Mobile Subscriber Identity (IMSI): A unique identifying number that identifies the phone/subscription to the GSM network
  • Mobile Country Code (MCC): A three-digit code that represents the SIM card's country of origin
  • Mobile Network Code (MNC): A two-digit code that represents the SIM card's home network
  • Mobile Subscriber Identification Number (MSIN): A unique ten-digit identifying number that identifies the specific subscriber to the GSM network
  • Mobile Subscriber International ISDN Number (MSISDN): A number that identifies the phone number used by the headset
  • Abbreviated Dialing Numbers (ADN): Telephone numbers stored in sims memory
  • Last Dialed Numbers (LDN)
  • Short Message Service (SMS): Text Messages
  • Public Land Mobile Network (PLMN) selector
  • Forbidden PLMNs
  • Location Information (LOCI)
  • General Packet Radio Service (GPRS) location
  • Integrated Circuit Card Identifier (ICCID)
  • Service Provider Name (SPN)
  • Phase Identification
  • SIM Service Table (SST)
  • Language Preference (LP)
  • Card Holder Verification (CHV1) and (CHV2)
  • Broadcast Control Channels (BCCH)
  • Ciphering Key (Kc)
  • Ciphering Key Sequence Number
  • Emergency Call Code
  • Fixed Dialing Numbers (FDN)
  • Forbidden PLMNs
  • Local Area Identitity (LAI)
  • Own Dialing Number
  • Temporary Mobile Subscriber Identity (TMSI)
  • Routing Area Identifier (RIA) netowrk code
  • Service Dialing Numbers (SDNs)
  • Service Provider Name
  • Depersonalizatoin Keys

This information can be used to contact the service provider to obtain even more information than is stored on the SIM card.

USIM-Universal Subscriber Identity Module

A Universal Subscriber Identity Module is an application for UMTS mobile telephony running on a UICC smart card which is inserted in a 3G mobile phone. There is a common misconception to call the UICC card itself a USIM, but the USIM is merely a logical entity on the physical card.

It stores user subscriber information, authentication information and provides storage space for text messages and phone book contacts. The phone book on a UICC has been greatly enhanced.

For authentication purposes, the USIM stores a long-term preshared secret key K, which is shared with the Authentication Center (AuC) in the network. The USIM also verifies a sequence number that must be within a range using a window mechanism to avoid replay attacks, and is in charge of generating the session keys CK and IK to be used in the confidentiality and integrity algorithms of the KASUMI block cipher in Universal Mobile Telecommunications System (UMTS).

In Mobile Financial Services, USIM seems to be a mandetory Security Element for user authentication, authorization and stored credentials. With the integration of NFC Handset and USIM, users will be able to make proximity payments where the NFS handset enables contactless payment and USIM enables independent security element. This is the evolution of the SIM for 3G devices. It can allow for multiple phone numbers to be assigned to the USIM, thus giving more than one phone number to a device.

Service Provider Data

Some additional information the service provider might store:


Service Providers that use SIM Cards in the United States

  • T-Mobile
  • Cingular/AT&T

Sim Card Text Encoding

Originally the middle-European GSM network used only a 7-bit code derived from the basic ASCII code. However as GSM spread worldwide it was concluded that more characters, such as the major characters of all living languages, should be able to be represented on GSM phones. Thus, there was a movement towards a 16-bit code known as UCS-2 which is now the standard in GSM text encoding. This change in encoding can make it more difficult to accurately obtain data form SIM cards of the older generation which use the 7-bit encoding. This encoding is used to compress the hexadecimal size of certain elements of the SIMs data, particularly in SMS and Abbreviated Dialing Numbers.

References