Proxy re-encryption service
To support future data forwarding with encryption use cases, allows a user to delegate access to others using a semi-trusted proxy service that does not have to decrypt the data and can just re-encrypt it with public keys and share.
- Advanced miner or proxy service
- Groups and orgs sharing access
- https://www.nucypher.com/ does this as a blockchain service
- but the Wikipedia page offers other self-hosted options