Download my Digital Certificate here. In Windows, simply double-click the file to import to your certificate manager.
I don't even want to get into using it in other OS's, but it will work just fine. My certs can also be verified/downloaded at Verisign.
For my PGP/GPG Key click here. If you want this, you hopefully know how to import it into whichever software package & OS combination you are using.
My keys can also be downloaded/verified at MIT's Keyserver.