The Dynamic Signature uses UA strings to add viewers info to the signatures you created.
Every time you visit a site, the following information is sent to the server you are requesting information from:

Our script simply captures the selected information sent from the browser of the people viewing your signatures. Then the information is Dynamically Added to your signature in real time.

THIS SCRIPT IN NO WAY INVADES THE PRIVACY OF YOU OR YOUR SIGNATURES VIEWERS!

The personalized information viewed on your signature is Only Visible to The Person Viewing it. Each signature viewer will see only the information gathered from their browser.