Octopus Encryption
System requirements
The software is currently available only for Windows XP/Vista OS.
The
.NET Framework 3.5 is required (you can get it following this
link).
How to use it
Step 1
First of all you need a 4096 bit key.
To create one, just click on the Keygen section, set the path and click on Create key button.

Step 2
To encrypt a file, go into the Encrypt section.
Select the original file to encrypt, set the destination path for the encrypted file, select the key file and click on Encrypt button.

Step 3
To decrypt a file, go into the Decrypt section.
Select the encrypted file to decrypt, set the destination path for the decrypted file, select the key file and click on Decrypt button.

Download
The software is totally free, accordingly with the freeware licence agreement.
Click on the following link to download the software: