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FHE style systems are possible if you use a hardware-based encryption approach like a Secure Enclave, but then you have a trust narrative that includes a Secure
by josh2600 6y ago
FHE style systems are possible if you use a hardware-based encryption approach like a Secure Enclave, but then you have a trust narrative that includes a Secure Enclave. For most use cases this is unacceptable.
Note: I work on a system design that I believe is acceptable that uses Intel’s SGX which we detail in this tech talk entitled “why sgx”: youtube.com/watch?v=Hwf_Q31woLo&utm .
- ezVoodoo 6y agoIf you believe in a Secure Enclave then there is no need for Fully Homomorphic Encryption anymore as all the computation can be carried securely in the SE. The question is the SE is not trustable for many people.
- josh2600 6y agoIt’s more complicated than “do you believe in SE”. There’s a difference between using a SE for storing durable secrets (a bad idea in most implementations I’ve seen) and using a SE for provably destroying a piece of information. The former means that a break is full jackpot, the latter means that a break compromises the system for a window in time and forward secrecy can be restored with a patch.