Client side encryption

[tbaumann]

Hi,

we love this. But providing a geo-redundant s3 bucket in our infrastructure would pretty much replace the complexity we tried to remove.

And hosting our data in a public cloud isn't really an option.

Therefore I would like to throw out the idea to implement some client side encryption for the data stored in s3. Just a shared key symmetric encryption would be plenty goo.

[tbaumann]

Apologies, duplicate of #63