MarpX Privacy

Manual Keys: Encrypt a File

  1. Choose file encryption
  2. Three fields to specify
  3. Browse and select a file
  4. Select a key
  5. The text wrap option
  6. Path and file name of result

Choose file encryption

When you launch the program in Manual Keys mode, you may skip inputting a personal ID code. Simply click on Manual Keys to arrive at this home page:



The first step to make a file private is to click Encrypt File near the lower left corner.

Three fields to specify


Below the "Manual Keys" reminder, there are three fields -- the file that you want to encrypt, your preferred key, and a check box on whether you want it text wrapped.


Click on Browse to select a file.

Browse and select a file


Navigate to the directory containing the file, highlight it, and click Open. You are shown the page with the one field in place:


Select a key

All manual keys in MarpxPrivacy consist of seven characters, some combination of upper case letters A-Z, lower case letters a-z, and digits 0-9. Suppose in this case you choose as key p6D9ivW. Simply enter it in the box.



You need a way to share keys with persons who are intended to have access to material you have encrypted. If doing so by telephone, you can use the NATO alphabet to make your choices clearer. The alphabet is represented by these 26 words: "Alfa, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India, Juliett, Kilo, Lima, Mike, November, Oscar, Papa, Quebec, Romeo, Sierra, Tango, Uniform, Victor, Whiskey, X-Ray, Yankee, Zulu". For example, you might say p6D9ivW this way: "Papa - digit six - capital Delta - digit nine - India - Victor - capital Whiskey". An option is to insert the words "lower case" in front of the letters that are not capitalized.

The text wrap option

Text wrapping turns an encrypted file totally into printable characters. Bad news: It adds roughly half again to the size of the file. Good news: Text wrapping generally makes it safe to send the file as an attachment with email and for copying and pasting it into other documents, either in social media pages or word processor files. See more about text wrapping. In this instance, let's turn on text wrap by clicking in the box.



Now click on Encrypt This File.

Path and file name of result


You are shown the location and name of the encrypted file. Click OK which normally returns you to the page to encrypt another file. However, in this instance since the encrypted file is relatively short and wrapped in text, you are shown this extra screen with display of the encrypted version. This could be copied and pasted to other places.



When finished, click either Encrypt Another File or Home.


MarpX Privacy