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 SecuStream™ Technology

 

Under the hood of SecureGSM™

 

What is the Signature Verification Tool (SVT)?

SecureGSM™ SVT is a comprehensive integrity verification tool for your genuine SecureGSM product.

During installation, signature files correspondent to each of the program files, along with list of all files that belong to a SecureGSM product installation are placed in the installation folder.

The signature files contain verification checksums of each file required to be verified. If the product or a component of the product is modified, corrupted or does not belong to that particular installation, its checksum will be different from what was recorded in its signature file.

The SVT is designed to detect such instances and alert users of non-genuine, modified or corrupted products.

Please see examples of error messages below for explanations and instructions on what to do if the verification procedure fails.

Why do we need the SVT?

To be sure that your SecureGSM product has not been physically modified by an unknown attacker or to ensure that you have installed a GENUINE, SecureGSM product, it is important to perform the signature verification test.

How often should I run SVT on my device?

Generally we recommend running SVT immediately after your product has been installed and registered, prior to important secure conversations and from time to time in between such occurrences.

How do I Run SVT?

Simply copy SVT to any folder on your device and launch the application by executing the SVT program file from your device's File Explorer. SVT will find the installed application on your device and will perform the required checks automatically. As soon as the signature verification test is complete you will be presented with a report screen.

Alternatively, you can store SVT on separate removable media (e.g. Storage Card), insert that media into your device and run SVT from there.

Always check which folder SVT has found your SecureGSM product in. You can display this information by pressing the "Show Folder" button on the SVT screen. If the path to the folder is different from what you believe you have installed SecureGSM to, then:

- there is a possibility that an attacker has modified the installation path of the SecureGSM product, replacing a genuine product with a modified one to compromise your security.

- if the test passes, you could mistakenly think that the installation path has been changed if you have forgotten the original installation path.

In both cases, however we would strongly recommend that you reinstall your product, Soft Reset your device and run SVT again. If there is still an issue with the installation path not being displayed correctly in SVT, then we strongly recommend that you perform a Hard Reset* on your device as soon as possible. This occurrence would be too serious to be ignored!

*Please refer to your device documentation for instructions on how to perform a Hard Reset.

Is it safe to keep SVT on the device at all the times?

DEFINITELY NOT! It is very INSECURE to keep the SVT physically on the device. To compromise your security, an attacker could modify the SVT tool in a way that SVT would ignore important file modifications.

Use the SVT to check the integrity of your product, but keep the SVT safe!

You should always keep SVT separate from your device, like removable media (e.g. memory card) and insert that media into the device only for signature verification purposes. Please remove that media from your device as soon as the verification procedure is complete.

Keep a backup copy of the SVT in a safe place to ensure you have access to a genuine tool at all times.

Note: the SVT is always available for download from the official SecureGSM Web site in the "Downloads" section.

Examples of SVT reporting messages:

***************************************

1. Integrity Verification: FAILED
  Invalid file
 
  filename.exe

***************************************

where filename.exe is name of the file which has failed verification.

generally one of the following options apply:

-file is modified

-file is corrupted

-file is of incorrect version (does not belong to current installation)

What to do!

Please backup your licence file, delete the installation folder and re-install your product from a trusted SecureGSM installation package and run the Signature Verification Tool as per the instructions outlined above.

Copy your license file back to the folder where you have installed your product. You can determine the installation folder (path) by pressing the "Show Folder" button in SVT.

If after full re-installation SVT cannot successfully verify your product, please perform a full Hard Reset* on you device and reinstall you product from a trusted installation package.

*Please refer to your device documentation for instructions on how to perform a Hard Reset.

***************************************

2. Integrity Verification: FAILED

  Can't find file

  filename.exe

***************************************

where filename.exe is name of the file which has failed verification.

generally one of the following options apply:

-file is missing

-file is renamed

What to do!

Please backup your licence file, delete the installation folder and re-install your product from a trusted SecureGSM installation package and run the Signature Verification Tool as per the instructions outlined above.

Copy your license file back to the folder where you have installed your product. You can determine the installation folder (path) by pressing the "Show Folder" button in SVT.

If after full re-installation SVT cannot successfully verify your product, please perform a full Hard Reset* on your device. and reinstall you product from a trusted installation package.

*Please refer to your device documentation for instructions on how to perform a Hard Reset.

***************************************

3. Integrity Verification:

  Successfully completed.

  All files verified ok.

***************************************

SVT has successfully validated your product.

 

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