| Category | AWS Nitro | TKO PoB | Winner |
|---|---|---|---|
| Isolation | VM-level, proprietary | SGX memory + TPM platform | TKO |
| Root of Trust | AWS-signed, closed | Open hardware, verifiable | TKO |
| Privacy | Raw disclosure | ZK-compressed <500B | TKO |
| Portability | AWS-only | Any SGX/TPM hardware | TKO |
| Proof Size | ~Few KB | <500B ZK-compressed | TKO |
| Schema | Fixed CBOR | Semver Protobuf | TKO |
TKO decomposes trust into orthogonal, composable proofs. No monolithic TEE assumptions. Evidence is a first-class artifact, not a vendor byproduct. The functor architecture enables compile-time dependency injection with minimal TCB — just the OCaml runtime and selected backends.