Tails is a live system that aims at preserving your privacy and anonymity. It helps you to use the Internet anonymously almost anywhere you go and on any computer but leave no trace using unless you ask it explicitly.

It is a complete operating-system designed to be used from a CD or a USB stick independently of the computer’s original operating system. It is Free Software and based on Debian GNU/Linux.
https://tails.boum.org/about/index.en.html

Full Database Encryption for SQLite
SQLCipher is an open source extension to SQLite that provides transparent 256-bit AES encryption of database files.
http://sqlcipher.net/