Sentinel
- Help
Integrity
Checker
-Overview and Help-
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What is the Integrity Checker?
What is a CRC32 Algorithm?
What files does Sentinel scan?
How to use the Integrity Checker
Overview:
-What is the Integrity Checker?
-> The
Integrity Checker is an advanced system file verifier. It uses a CRC32
Algorythim (Cyclic Redundancy Checksum) to verify your system files and
make sure they haven't been modified.
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-You
lost me. What is a CRC32 algorythim? What does it do; and how does it
work?
->A
CRC32 check will produce a 'digital fingerprint' of any file. Any size
files will be reduced to a small code that represents the whole file.
If the file changes, it will produce a new finger print. What makes a
CRC32 algorythim so great, is that even a tiny change will yeild a completely
different digital fingerprint; so if even a space is added to the end
of the file, the signatures will not match at all!
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-What
types of files will Sentinel scan for Integrity?
->Sentinel
will scan only files located in the Windows\System directory (Windows
95/98/ME) and the Windows\System32 directory (Windows 2000/XP/NT). The
files located in these directories are some of the most valuable files,
and is the most probable location for a virus or trojan to infect or hide
itself.
-> The files that Sentinel scans are DLL (Dynamic Linked Library),
DRV (Driver), 386 (Virtual Device Driver), SYS (System File), OCX (Active
X Control), EXE (Executable), COM (MS-DOS Application), as well as PIF
and SCR files (two commonly exploited file types - MS-Dos Shortcut Files
and Screensavers).
->Sentinel
saves all CRC32 information in the Integrity.dat file. And each entry
is encrypted using a very strong encryption algorythim (to prevent programs
from editing Sentinel's Integrity file, to make them appear as valid).
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How
to Use the Integrity Checker:
1)
Choose the Folder you would like to scan using the drop-down list.
- You may add folders you would like to monitor by clicking on the 'Add/Remove
Custom Folders' button. For help using the Custom Folder screen,
click here
2)
Select the files you would like to scan in that folder (Sentinel will
scan the file types with a check mark next to them).
3)
Click on the 'Scan Folder Now' button to begin the scan.
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