Bruce Schneier secures his laptop's data using PGP Disk's Whole Disk Encryption tool (read about his security measures here).

I do use one of his suggestions though: don't keep important information on a laptop.

Given he's the author of a number of popular cryptography and security related books, I can see him being more paranoid than me. Some of you however should consider the security of the data on your laptop ... (even if you don't go as far as Bruce); what if the data on your laptop was suddenly made available on the Internet?

My favorite book from Bruce is definitely Applied Cryptography. (I admit it puts me to sleep reading it, but I still enjoy the math and the code -- even if some of it zings right over my head!).

(Yikes, the PGP Whole Disk Encryption tool is expensive at $149 US. Security certainly does come at a cost! I thought they had reasonably priced stuff for home use ... but I don't see anything reasonably priced -- PGP Desktop Home 9.7 is $99 US).