Difference between pages "Steganalysis" and "Damaged SIM Card Data Recovery"

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==External links==
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== Summary ==
===Steganalysis===
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* [http://www.sarc-wv.com Steganography Analysis and Research Center] The Steganography Analysis and Research Center is a Center of Excellence within Backbone Security focused exclusively on steganography research and the development of various steganalysis products and services.
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A prerequisite for the use of SIMIS, is that the SIM card must be functional. A physically damaged, broken or dirty SIM may not function correctly, resulting in the recovery of corrupted data, or no data at all. In the forensic data recovery environment, SIM's will be presented in a variety of different conditions, ranging from good, but lightly soiled, through blood soaked to physically broken. Lightly soiled and blood soaked SIM's may be cleaned using appropriate methods, ensuring that the SIM is not further damaged taking care to preserve surface printing where possible.
===Steganalysis Training===
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* [http://www.sarc-wv.com/training.aspx Certified Steganography Examiner Training] A comprehensive two-day training course on steganography and steganalysis techniques provided by the SARC.
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However, physically damaged or broken SIM's require more specialised processing to produce a viable SIM for data recovery purposes. Crownhill has extensive experience in the area of SIM data recovery through its activity in the SIM manufacturing process. Crownhill works directly with the SIM silicon manufacturers and SIM card manufacturers. Processes developed to aid fault analysis and qualitative measurements are an invaluable advantage when attempting to repair and recover data from physically damaged SIM modules.
===Algorithms and Tools===
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* [http://www.sarc-wv.com/safdb.aspx Steganography Application Fingerprint Database] A fundamental goal of the SARC is to collect steganography, watermarking, and other data-hiding applications from various sources and incorporate file profiles computed from them into the SAFDB. The SAFDB can be used to review files on seized media by matching file profiles in the SAFDB. SAFDB is the most extensive steganography hash set publicly available. The file profiles contain identifying information such as filename, associated application name, file size, and several unique hash values. These hash values may be used to determine the presence of a steganography application or artifact of a steganography application on the media being examined. The SAFDB is available for download in formats compatible with most of the popular digital forensic tools and utilities: EnCase, Forensic Toolkit (FTK), HashKeeper, ILook, and ProDiscover. MD5 extracts of SAFDB are freely available for law enforcement. Contact the SARC for details.
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Crownhill have invested in purpose-built laboratory facilities to provide professional card cleaning, data recovery and card repair service. Based in discrete, secure premises, Crownhill can provide the full compliment of services required to clean, repair and recover data from damaged SIM's. Drawing on its own expertise and relationships with Card manufacturers and silicon vendors world-wide, Crownhill have created a centre of excellence for this specialised work. An overview of the procedures can be found here
* [http://www.sarc-wv.com/stegalyzeras.aspx Steganography Analyzer Artifact Scanner (StegAlyzerAS)] StegAlyzerAS gives you the capability to scan the entire file system, or individual directories, on suspect media for the presence of steganography application artifacts. And, unlike other popular forensic tools, you can perform an automated or manual search of the Windows Registry to determine whether or not any Registry keys or values exist that can be associated with a particular steganography application.  
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* [http://www.sarc-wv.com/stegalyzerss.aspx Steganography Analyzer Signature Scanner (StegAlyzerSS)] StegAlyzerSS gives you the capability to scan every file on the suspect media for the presence of hexadecimal byte patterns, or signatures, of particular steganography applications in the files. If a known signature is detected, it may be possible to extract information hidden with the steganography application associated with the signature.  
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Where a SIM is thought to be functional, Crownhill can provide a SIM cleaning service. Blood, soot, general soiling and body fluids are handled in an environmentally secure fashion, relieving the client of responsibility for Bio Hazards and other Health and Safety issues. Cleaned SIM's are returned without undue delay, ready for data recovery by the client. Cleaning by Crownhill must be carried out after the SIM has been pre-processed for any physical evidence required, such as Photography and DNA sampling.
* [http://www.sarc-wv.com/stegalyzerrts.aspx Steganography Analyzer Real-Time Scanner (StegAlyzerRTS)] StegAlyzerRTS is the first commercially available network security appliance in the world capable of detecting the fingerprints and signatures of digital steganography applications in real-time.
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Data Recovery Process
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== Data Recovery Process ==
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If our findings suggest that data recovery is likely to be possible, the SIM may further examined by real time X-ray, to determine the extent of the damage. Specifically we will be looking for broken or damaged wire bonds, detachment of the silicon die and possible fractures of the die.
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=== Decapsulation ===
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Where a damaged bond wire(s) is clearly identified and if there is no obvious damage to the silicon die, the die encapsulation can be removed. The de-capsulation process requires a great deal of skill and the use of proprietary mixes of aggressive solvents and/or acids. The exact process used depends upon the.
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=== Testing ===
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After de-capsulation, further electrical tests are carried out to confirm the viability of the recovered silicon die. The die bonding pads are then probed and once electrical connection is established, the silicon is accessed and the sim data recovered using proprietary software.
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=== X-Rays ===
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Real time X-ray examination is used to confirm the conclusions drawn from the preceding Physical, Optical and Electrical tests. X-ray examination is only undertaken where the integrity of the silicon die is thought to be uncompromised.

Revision as of 01:17, 24 September 2008

Summary

A prerequisite for the use of SIMIS, is that the SIM card must be functional. A physically damaged, broken or dirty SIM may not function correctly, resulting in the recovery of corrupted data, or no data at all. In the forensic data recovery environment, SIM's will be presented in a variety of different conditions, ranging from good, but lightly soiled, through blood soaked to physically broken. Lightly soiled and blood soaked SIM's may be cleaned using appropriate methods, ensuring that the SIM is not further damaged taking care to preserve surface printing where possible.

However, physically damaged or broken SIM's require more specialised processing to produce a viable SIM for data recovery purposes. Crownhill has extensive experience in the area of SIM data recovery through its activity in the SIM manufacturing process. Crownhill works directly with the SIM silicon manufacturers and SIM card manufacturers. Processes developed to aid fault analysis and qualitative measurements are an invaluable advantage when attempting to repair and recover data from physically damaged SIM modules.

Crownhill have invested in purpose-built laboratory facilities to provide professional card cleaning, data recovery and card repair service. Based in discrete, secure premises, Crownhill can provide the full compliment of services required to clean, repair and recover data from damaged SIM's. Drawing on its own expertise and relationships with Card manufacturers and silicon vendors world-wide, Crownhill have created a centre of excellence for this specialised work. An overview of the procedures can be found here

Where a SIM is thought to be functional, Crownhill can provide a SIM cleaning service. Blood, soot, general soiling and body fluids are handled in an environmentally secure fashion, relieving the client of responsibility for Bio Hazards and other Health and Safety issues. Cleaned SIM's are returned without undue delay, ready for data recovery by the client. Cleaning by Crownhill must be carried out after the SIM has been pre-processed for any physical evidence required, such as Photography and DNA sampling. Data Recovery Process

Data Recovery Process

If our findings suggest that data recovery is likely to be possible, the SIM may further examined by real time X-ray, to determine the extent of the damage. Specifically we will be looking for broken or damaged wire bonds, detachment of the silicon die and possible fractures of the die.

Decapsulation

Where a damaged bond wire(s) is clearly identified and if there is no obvious damage to the silicon die, the die encapsulation can be removed. The de-capsulation process requires a great deal of skill and the use of proprietary mixes of aggressive solvents and/or acids. The exact process used depends upon the.

Testing

After de-capsulation, further electrical tests are carried out to confirm the viability of the recovered silicon die. The die bonding pads are then probed and once electrical connection is established, the silicon is accessed and the sim data recovered using proprietary software.

X-Rays

Real time X-ray examination is used to confirm the conclusions drawn from the preceding Physical, Optical and Electrical tests. X-ray examination is only undertaken where the integrity of the silicon die is thought to be uncompromised.