Hi how to install Ubuntu 12.04+ with full disk encryption including encrypted boot partition : a- to a USB drive ie. 16GB or 32GB b- to a HDD
For 12.10 it's an option during the install.
For 12.04 I believe this guide covers it pretty well.
1) Download Ubuntu
2) Go to “How to create bootable USB”
3) Download Pen Drive Linux USB installer
4) Install the Pen Drive Linux USB installer
5) Locate the
6) Install it into any USB stick
7) Follow instructions from here