Securing data on a USB pendrive can allow you to carry around useful, yet sensitive data with very few concerns. This post outlines a way of cryptographically securing a USB pendrive using crypsetup and LUKS in such a way that a drive may be unlocked on most Linux system without the addition of extra software (e.g. TruCrypt). As an added bonus it's possible to mount the drive in a Windows environment as well. Hurrah! The first thing to decide is how you are going to partition your drive. I find it useful to have an unencrypted partition as well as the encrypted as this affords the convenience and functionality as well as offering security. The primary consideration here is that natively Widows will only recognise the first partition on the pendrive, so if you wish to have an open data partition let it be the first. Below shows how an 8GB pendrive (in this case the device is /dev/sdh) is split roughly is half with an ~4GB FAT32 partition at the front. Use you favorite partition...