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DLF10A
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DLFAT.DOC
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Text File
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1994-03-25
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7KB
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165 lines
DataLOCK Fat v1.0
32-Bit Key Encryption for Floppy Disks
revision 03.19.94
(C)1994 RH Enterprises/W.R. Herx
┌─────────────────────┐
│WHAT IS DATALOCK FAT?│
└─────────────────────┘
Floppy disk security to the average person is locking the disks in a
filling cabinet. Your precious data is protected by an 89 cent lock!
Not anymore! DataLOCK Fat (DLF) will render any standard floppy disk
totally useless to the average person in seconds. You will be issued
a 32-bit key code to allow you to unlock the disk again. Only with
this code, will your data be accessible.
┌──────────────────────────┐
│WHY IS DATALOCK DIFFERENT?│
└──────────────────────────┘
Most data security products require encryption of entire files which
can sometimes take up to 3 minutes while working with a full diskette.
DLF takes only seconds to secure your data and it is just as secure as
the others.
┌───────────────────────┐
│HOW SECURE IS DATALOCK?│
└───────────────────────┘
DLF isn't nearly as secure as RSA encryption but it doesn't take nearly
as long to use either. DLF will issue a different 32-bit key for every
disk it encrypts. There are a total combination of around 4.5 billion
keys, thus making it nearly impossible to randomly attempt to crack it.
For most commercial, non-governmental purposes, this should provide en-
ough security. Cracking the key code for a single disk would take we-
eks, if not months. The key encryption routine used within DLF cannot
be reverse engineered because it relies on system information at the
time of encryption which cannot be duplicated.
┌───────────────────┐
│A BRIEF LOOK AT DOS│
└───────────────────┘
Every floppy disk contains space reserved for DOS to use. This space
is called the System Area of the disk. The System Area consists of
the boot sector, File Allocation Table 1, File Allocation Table 2, and
the root directory. The FAT is basically a map of where information
is stored on the drive. Whenever a file is written to a disk an entry
is made in the FAT table recording where the file is physically located
on the disk. Whenever you use DOS to delete a file, the data isn't
physically removed from the disk. The FAT entry for that file is sim-
ply zeroed out telling DOS that the space is again available. DOS keeps
a backup copy of the FAT table, that is the reason FAT2 exists. In the
event that the FAT table becomes corrupted, DOS can retrieve it's needed
information from the backup.
┌───────────────────────────┐
│HOW DOES DATALOCK FAT WORK?│
└───────────────────────────┘
DLF relies on a 32-bit key encryption routine that encrypts both copies
of the FAT (File Allocation Table) and the Root Directory. With both
copies of the FAT (FAT1 & FAT2) being encrypted, DOS thinks that your
disk is corrupted and not useable. All pointers to all files have been
changed into senseless garbage. Even popular disk recovery programs such
as Norton Disk Doctor cannot recover the data. Disk Recovery programs
rely on pieces of information extracted from both copies of the FAT
table, it compares the good pieces and tries to piece back together the
corrupted pieces. DLF makes every piece of the FAT appear corrupted ma-
king the task of FAT repair impossible. Your data is inaccessible with-
out decrypting using the key.
┌───────────────────────────┐
│MINIMUM SYSTEM REQUIREMENTS│
└───────────────────────────┘
640k IBM/COMPATIBLE XT - MSDOS 3.0 - 3.5" or 5.25" floppy drive.
This software was beta tested on the following computers with the
following DOS versions:
XT DOS 3.0 (This computer was also monochrome)
286/16 MSDOS 5.0
386/40 MSDOS 4.0
486/33 MSDOS 6.0
486/33 MSDOS 6.2
486/DX2-66 MSDOS 6.2
┌─────────────────────────┐
│RUNTIME PARAMETERS, USAGE│
└─────────────────────────┘
You can receive a listing at the dos prompt by typing DLFAT with no
other parameters.
ENCRYPTION:
----------
syntax: DLFAT x e
replace the x parameter with the drive that contains the disk you
would like to encrypt, A or B.
You will then be issued a unique 32-bit key code which you will
need to decrypt the disk when you desire to access it again.
**NOTICE: IT IS VERY IMPORTANT THAT YOU DO NOT LOSE THE CODE, FOR
YOUR SECURITY, YOUR CODE IS NOT WRITTEN ANYWHERE ON THE DISK, IF
YOU LOSE IT, YOUR DATA CAN NEVER BE ACCESSED AGAIN!
DECRYPTION:
----------
syntax: DLFAT x d
replace the x parameter with the drive that contains the disk you
would like to decrypt, A or B.
You will then be prompted to enter the proper key code for this
disk. DLF will inform you in the event that you've entered an
invalid key code. With DLF, there is no chance of "double en-
cryption" which is caused by decrypting with the wrong series
of numbers!
┌─────────────────────────┐
│REGISTRATION INFORMATION:│
└─────────────────────────┘
To register DataLOCK Fat and receive a copy of DataLOCK Fat for Windows
upon it's completion, use your favorite word processor to fill out the
registration form (REGISTER.DOC), print it, and mail it in!
┌───────────────────┐
│WARRANTY DISCLAIMER│
└───────────────────┘
The Author cannot and does not warrant that any functions contained in the
Software will meet your requirements, or that its operations will be error
free. The entire risk as to the Software performance or quality, or both,
is solely with the user and not the Author. You assume responsibility for
the selection of the program to achieve your intended results, and for the
installation, use, and results obtained from the Software.
The Author makes no warranty, either implied or expressed, including with-
out limitation any warranty with respect to this Software documented here,
its quality, performance, or fitness for a particular purpose. In no event
shall the Author be liable to you for damages, whether direct or indirect,
incidental, special, or consequential arising out the use of or any defect
in the Software, even if the Author has been advised of the possibility
of such damages, or for any claim by any other party.
All other warranties of any kind, either express or implied, including but
not limited to the implied warranties of merchantability and fitness for a
particular purpose, are expressly excluded.
┌────────────────┐
│FUTURE PRODUCTS:│
└────────────────┘
- DataLOCK Fat for Windows
- DataLOCK Boot
* Note: DataLOCK Fat for Windows will be shipped to registered DataLOCK
Fat DOS owners upon it's completion.