Tool for encrypting and decrypting a file (to prevent it from being misused by someone else) in DOS.

Its uses polygraphic substitution ciper for encryptions, and uses a checksum to verify the integrity of the decrypted file. It can be used to prevent someone else to misuse your file in case he/she gets hands on it. This is a DOS program, hence you would need DOSBox to use it.

Start ENCRYPT.EXE. Select Encrypt File.

Original file README.md to be encrypted.

Enter original file name : README.md.

Enter password for file : ******.

Renter password for file : ******.

Enter encrypted file name : README.MDE.

Encryption done : README.md -> README.MDE.

Encrypted file : README.MDE (to be decrypted).

Select Decrypt File.

Enter encrypted file name : README.MDE.

Enter password for file : ******.

Renter password for file : ******.

Enter decrypted file name : README.MDD.

Decryption done : README.MDE -> README.MDD.

Decrypted file README.MDD, same as original README.md.