I think the better question is, "What could count as metadata that we don't have to encrypt?" But to answer yours: https://github.com/vuvuzela/vuvuzela https:/

I think the better question is, "What could count as metadata that we don't have to encrypt?" But to answer yours: https://github.com/vuvuzela/vuvuzela https://github.com/vuvuzela/vuvuzela Encrypting metadata is a huge challenge. In the meantime, our best bet is to use open-source systems that we know won't be harvesting metadata.