2. The method of claim 1 wherein the plurality of alphanumeric characters are letters A-Z of English alphabet and decimal numbers 0-9.
2. The method of claim 1 wherein the plurality of alphanumeric characters are letters A-Z of English alphabet and decimal numbers 0-9. 3. The method of claim 2 further comprising: inserting a second set of markup language tags into the message, wherein the second set as a whole, once interpreted by a client program of the recipient, results in an image of a credit card being displayed.