The Raspberry is all well and nice and can run pretty quick. But how can I protect my SD card from offline data attacks. SSH can be protected with a good password or a SSH key but if somebody gets hold of the card I would like it to be encrypted in the most part.
For example all my source php files or any other source code is stored on the SD card and can be easily mounted into another linux system. But i want to prevent this by encryption the entire SD card somehow.