MarpX Privacy

Set Up to Share Confidential Matters

  1. Share privately with a would-be confidant
  2. Name of a confidant
  3. Short name
  4. Date(s) in a roster entry
  5. The Extreme Encryption option
  6. Authentication code for a confidant
  7. Go to your roster page

Share privately with a would-be confidant

Let's use the word confidant for anyone with whom you set up to exchange information confidentially. Setting up requires a few pieces of information which you will each add into a roster (list) of confidants. You both become confidants through this process. (Incidentally, if a person is known to be female, the spelling is confidante, a reminder that the English language adopted the word from French some three centuries ago.)


A confidant relationship does not have to be restricted to just two people. More can meet or share the same points below. Caution: If a group gets too large, there is greater risk of someone revealing the all-important authentication code.

Share some information privately with your prospective confidant

So you want to be able to share messages and files securely with another person? Great. Get in touch with that person in some way that eavesdroppers or hackers cannot find out what's going on. The average computer hacker is not likely to listen in on a telephone call, or detect what you say face to face, or intercept your mail. Pick some way that strikes you both as secure.


Some of the information below may be public. Two items need to be treated securely.

Name of a confidant

Later, when you go to encrypt or decrypt content with a confidant, you need to select that person's name from a list (here called a roster). That list displays names in alphabetic order, followed usually by the start date of the confidant relationship. If this setup is for you and one other person, you simply need the other person's name. If this is for sharing among a group of people, you need to agree upon a name for the group or team or department or whatever.


Names have to be displayed in order to select one for exchanging information. Therefore, names are treated as public.

Short name

When you are in automatic keys mode, initials or a three character short name followed by an underscore are inserted at the beginning of file names. The three characters may be either letters or numeric digits. They are used at the beginning of message file names. If preferences are set, the same three characters and underscore are prefixed to the names of files that are being encrypted.


If you create a new entry for a person or group already in your roster, a different short name would help to identify which roster entry was used to encrypt a file. For example, "SBT" might in a later entry be replaced by "ST1" or "ST2".


Short names may be treated as public information, in which case they are shown as part of the roster display.

Date(s) in a roster entry

MarpxPrivacy usually fills in the current date for a new roster entry. You are free to change it to a different format or to a different date if that makes sense for you. The main reason for the date is so that you can distinguish between two or more entries for the same relationship, but for different time periods. There's more about this in the page on editing a roster entry.


These dates can be treated as public information.

The Extreme Encryption option

If your exchange is to be protected by Extreme Encryption, you each need access to the same Private Exchange Tool (PET) purchased from It has to be unencrypted when you first reference it; the program will encrypt it for your security after you have added the name and location of a PET within a new roster entry.


Each Private Exchange Tool should be used for only one confidant relationship.

Authentication code for a confidant

The authentication code must be kept totally secret between the two persons or among the team in that confidant relationship. Agreement is needed (privately!) on a seven character code chosen from among capital letters A to Z, lower case letters a to z, and digits 0 to 9. Don't make it simple! ... something like "b8Tfo9S" is much better than "OurCode".


Did we mention that authentication codes should be kept secret?

Go to your roster page

Each confidant needs to launch MarpxPrivacy in "Automatic Keys" mode. (Remember to input your personal ID code.) When you click on Automatic Keys, you are shown your roster to date and a row of buttons that allow you to do things with that list.



With the above information in hand, you are ready to click on the Add New Entry button.


MarpX Privacy