Encryption at rest for database files

[ErikBjare]

With sync getting pretty good, I started thinking about the security implications of the sync folder. It seems prudent to ensure they are encrypted at rest, so I started investigating and found SQLCipher which it might be doable to use without too much effort.

[Mart-Bogdan]

That's good idea.

But License compatibility is a question. SQLCipher uses custom license, I'm not sure what implications are.

As I understand more can be read here: https://www.zetetic.net/sqlcipher/license/