Technology
Fully homomorphic encryption, at production speed.
Use the data without opening it. Software proved the mathematics. Umbra makes the cost payable in a rack.
The problem with FHE
Solved in theory, unusable in practice
The decryption gap is the moment useful data must be decrypted to be computed on. Fully homomorphic encryption has been mathematically sound since 2009, and roughly ~1000× too slow for a rack. Umbra does not claim to eliminate the cost of encrypted computation. It claims to have made that cost payable.
Umbra runtime
Properties, not mechanism
- Noise-free by architectural design: encrypted operations do not accumulate error that must be refreshed.
- No bootstrapping: the runtime never pauses to re-encrypt intermediate state.
- Deterministic encrypted execution: same ciphertext inputs, same ciphertext outputs.
What changes
Two axes, reported separately
Operation-level · vs lattice FHE
Orders of magnitude faster individual encrypted logic operations against conventional lattice FHE: the baseline where FHE has lived for fifteen years.
System-level · vs native
End-to-end overhead against equivalent native computation is ~50×. Reported on its own axis: never merged with operation-level acceleration.
The ciphertext never opens. That is the claim.
Post-quantum
Resilient by construction
Post-quantum resilient architecture. An architectural property: not a certification badge.
Technical whitepaper
Architecture overview, threat model and evaluation methodology. Sent to your work address.