What is Info Crypt?

Info Crypt is an unique utility for encrypting 3’5 diskettes. This utility changes bytes of a diskettes FAT. It's practically impossible to copy or read an encrypted diskette properly, because there are 2^36864 combinationts and to check one of them they need approximatly 20 seconds.

Example:

Before encryption:

FAT Sectors            OS can read only this string: CD-Drive             After encryption:
Lightly changed FAT Sectors             OS can read only this string: DCD-irev


License

You may use this software during a test period of 14 days. Following this test period of 14 days or less, if you wish to continue to use Info Crypt, you must pay in the registration fee to the tune of $24 and receive the registration code. The license, bought by you, allows to use Info Crypt only on two systems simultaneously. Any distribution of your registration code is prohibited and it deprives you of the bought license automatically.

You should register, because, as registered user, you:

-	may use passwords longer than one symbol

-	may use not only digital passwords

-	may change any byte of the FAT

-	may use inverted passwords

-	making possible new releases

-	gain the right to use all future releases


Encryption and decryption

There are four ways of encryption, three of them are available in unregistered version. In this help book you can read tutorials for all of them. Please note that files smaller than 512kb can be read even from an encrypted diskette.

WARNING: After "Write FAT" operation is completed, you should take your diskette out of your floppy drive!


“Single Password” method

Encryption

The encryption process consists of 5 steps:

1. Insert a diskette

2. Press "Read FAT" button

3. Enter a password in the password section

4. Press "Modify FAT" button

5. Press "Write FAT" button

Decryption

The decryption process consists of 5 steps:

1. Insert an encrypted diskette

2. Press "Read FAT" button

It is highly recommended to save the read FAT to a file

3. Enter the password in the password section

4. Press "Modify FAT" button

5. Press "Write FAT" button

If you have decrypted the diskette incorrectly then press “Write last read FAT and open it” button and try to decrypt it again (from step 3).

This way of encyrption is available in unregistered version, but password can not be longer then one digit (if you enter password longer then one digit, first digit will be used a password other digits will be ignored).


“Multi Password” method

Encryption

The encryption process consists of 5 steps (min):

1. Insert a diskette

2. Press "Read FAT" button

3. Enter a password in the password section

4. Press "Modify FAT" button

Now you may repeat steps 3 and 4

5. Press "Write FAT" button

Decryption

The decryption process consists of 5 steps (min):

1. Insert an encrypted diskette

2. Press "Read FAT" button

It is highly recommended to save the read FAT to a file

3. Enter the password in the password section

4. Press "Modify FAT" button

Now you may repeat steps 3 and 4

5. Press "Write FAT" button

Remember that while you are decrypting you diskette you should begin entering passwords from the last one.

If you have decrypted the diskette incorrectly then press “Write last read FAT and open it” button and try to decrypt it again (from step 3).

This way of encyrption is available in unregistered version, but password can not be longer then one digit (if you enter password longer then one digit, first digit will be used a password other digits will be ignored).


 “Bytes modification” method

Encryption

The encryption process consists of 4 steps (min):

1. Insert a diskette

2. Press "Read FAT" button

3. Click any byte in the graphics projection of FAT, in appeared dialog enter the new value for it.

Now you may repeat step 3

4. Press "Write FAT" button

Decryption

The decryption process consists of 4 steps (min):

1. Insert a diskette

2. Press "Read FAT" button

3. Click an encrypted byte in graphics projection of FAT, in appeared dialog enter it's original value.

If there are encrypted bytes left repeat step 3

4. Press "Write FAT" button

If you have decrypted the diskette incorrectly then press “Write last read FAT and open it” button and try to decrypt it again (from step 3).

This way of encyrption is unavailable in unregistered version.


“FAT to file” method

Encryption

The encryption process consists of 5 steps:

1. Insert a diskette

2. Press "Read FAT" button

3. Save FAT to a file

4. Open any other FAT

5. Press "Write FAT" button

Decryption

The decryption process consists of 4 steps:

1. Insert an encrypted diskette

2. Press "Read FAT" button

3. Open the original FAT

4. Press "Write FAT" button

If you have decrypted the diskette incorrectly then press “Write last read FAT and open it” button and try to decrypt it again (from step 2).

This way of encyrption is available in unregistered version, but password can not be longer then one digit (if you enter password longer then one digit, first digit will be used a password other digits will be ignored).


Options

Do not display password (unchecked by default)

If checked, in password section '*'-symbols are displayed instead of real symbols.

Only digits in password (checked by default)

If checked, you password may consists only of digits (0,1,2,...,9).

FAT sectors view only (checked by default)

If checked, “FAT to file” method is unavailable

Inverted password (unchecked by default)

If checked, it changes bits in password 0 to 1, 1 to 0

Example:

password="a"

binary code="00110011"

inverted password="Ì"

inverted binary code="11001100"

Do not modify empty bytes (unchecked by default)

If checked, bytes with binary code="00000000" will not be modified (recommended, especially for not full diskettes).

You may modify all these options in unregistered version only.


Operations

Read FAT

Reads the file allocation table (FAT) from the diskette and opens it.

Write FAT

Writes opened file allocation table (FAT) to the diskette.

Write last read FAT and open it

Writes the last read file allocation table (FAT) from the diskette and opens it ("undo" button analog).

Modify FAT

Modifies the opened file allocation table (FAT), but doesn't write it to the diskette.

All these operations are available in unregistered version.


Disclaimer

This utility is supplied "As is"; this means that the program should be used at your own risk. Nobody is responsible for anything that happens to your computer after using this utility.


Conventions

This Help file uses the following conventions:

Convention	Use
“Read FAT” button	Shortcut: Ctrl+R Operation: Read FAT Picture:
“Write FAT” button	Shortcut: Ctrl+W Operation: Write FAT Picture:
“Write last read FAT and open it” button	Shortcut: Ctrl+L Operation: Write last read FAT and open it Picture:
“Modify FAT” button	Shortcut: Ctrl+M Operation: Modify FAT  Picture:


Technical support

You can always download the latest version of Info Crypt at it’s official web-page:

URL: http://www.quaz.aaanet.ru/ic/

Please write about your problems, send your suggestions, bug reports by:

e-mail : quaz@aaanet.ru

fax     : +78632902114