How to encrypt file?

Download Strong File Encryption Decryption Utility and install it. Following is the step-by-step gudie to encrypt your file or folder.

1. Start the program.

2. In the Main Window click on a file or on a folder to select it. In the left panel you can select folders. In the right panel you can select a folder or a file.

3. Click Encrypt button.

4. Define options in the Encryption Options dialog box.

5. Click Next to display Execute window.

6. Click Execute to start encryption. Verify encryption log in the Execute window.

7. Click Close to return to the main program window.

Main Window

1. Start Strong File Encryption Decryption utility. The Main Window is displayed.

2. In the Main Window you can select a file or a folder for encryption or decryption.

3. Click Encrypt or Decrypt to set encryption or decryption options.

Encryption Options

1. Verify the name of the selected folder in the Encrypt Files From This Folder edit box. To change the selected folder click Select and select a new folder. You can also click Close and select a new folder in the main window.

2. Decrypt Files Into This Folder displays a destination folder. Encrypted files will be saved into this folder. To select or create a destination folder click Select. Select or make a new folder in the Browse For Folder window.

3. Encrypt Files With This Name edit box displays the name of the selected file if the file was selected for encryption, or displays a wildcard (*.*) if a folder was selected for encryption. The wildcard *.* means all files from the selected folder will be encrypted. You can define your wildcard here. For example if you enter *.txt only text files will be encrypted.

4. Enter a new extension in the Change File Extension To edit box. Empty box means that all encrypted files will be created with the same name and extension as your original files. If you enter new value then encrypted files will have file extension changed. For example you can enter ENC as a new extension. If a file selected for encryption has BACKUP.DAT name, then this file will be encrypted and saved as BACKUP.ENC. Use this option with caution. For example if you have two files backup.dat, backup.zip, and you defined ENC as new extension then after encryption you will have only one file backup.enc. For Encryption you can use a '+' in Change File Extension To edit box, for example "+.enc". This means that the encrypted files will have ".enc" added to the names, for example "data.dbf" will be encrypted as "data.dbf.enc", "data.mdx" will become "data.mdx.enc". For Decryption you will have to enter "-.enc". This means that the decrypted files will have ".enc" removed from the end of the names, so "data.dbf.enc" will become "data.dbf".

5. Click Encryption Type selection box and select the encryption type you want to use.

6. Click Key Size selection box and select the key size.

7. When Rijndael(AES) or Twofish encryption algorithm is selected:

Private Key edit box displays the value of your secret key. You can generate, load, or paste from Clipboard your private key into this box. If it is a new key make sure you save it for future use.

Click Generate Private Key From Password Phrase to generate a secret key from the password phrase.

Click Load Private Key From A File to load a secret key from the file.

Click Save Private Key To A File to save a secret key to a file.

8. When RSA encryption algorithm is selected: Private Key edit box displays the value of your private key. You can generate, load, or paste from Clipboard your private key into this box. If it is a new key make sure you save it for future use.

Public Key edit box displays the value of your public key. You can generate, load, or paste from Clipboard your public key into this box. If it is a new key make sure you save it for future use.

Click Generate Public and Private Key Pair to generate a pair of keys.

Click Load Public and Private Key From A File to load the key pair from a file.

Click Save Public and Private Key To A File to save the public and private keys to a file.

9. Select Delete Source File check box to delete source file(s).

10. Select Unzip Before Encryption to unzip a selected file. Click Select and select a file.

11. Select Zip After Encryption to zip encrypted files. Click Select and select a destination folder and a name of the zipped file. You can enter a new file name (example: encrypted.zip) and a new file will be created automatically.

12. Click Next to display Execute window.

Strong File Encryption Decryption Utility

PrimaSoft Strong File Encryption utility is a Windows software that allows you easily and quickly to encrypt and decrypt selected files or folders on your computer using the latest industry standard strong encryption algorithms:
* AES (US Advanced Encryption Standard, secret-key encryption also known as Rijndael)
* Twofish (secret-key encryption)
* RSA (public-key encryption)

Encryption Definition

Encryption is the process of encoding or decoding information so that people will be unable to read it. A password (key) is required to encrypt or decrypt the information. PrimaSoft Strong Encryption / Decryption windows utility uses the following encryption algorithms: Rijndael(AES), Twofish, RSA encryptions.