Writes John Keller: Hi Lew, Here is a great tutorial series from the E-privacy Gurus at the Electronic Frontier Foundation. They describe in detail how to setup two-factor authentication for some popular online services such as Gmail, Twitter, and more, as well as considerations to prevent linked accounts from giving away your privacy should the G-men come knocking with a digital warrant. Wishing all the LRC readers a merry (and secure!) Christmas!