This. I have a web-app project for which encryption would be ideal. However I have already a hard time finding an encryption capable database. PostgreSQL has

This. I have a web-app project for which encryption would be ideal. However I have already a hard time finding an encryption capable database. PostgreSQL has a pg-crypto but it looks like an after fought module. Right now the best solution I can find is each user gets an encrypted SQLite database on my server. But what happens when 2 or more users need to share data that are in their respective databases ?