Blyss

Blyss is a key-value store that offers developers unusually strong privacy guarantees. It allows developers to create S3-like buckets, fill them with data, and then make cryptographically secure retrievals. The special privacy property of Blyss is that retrieval from a bucket is completely private. No entity, not even the Blyss service itself, can determine what key a client retrieves. This property is cryptographic; it’s not based on the security of special hardware enclaves or trusted third parties.