Minimalist Trusted Execution Framework for Confidential Blockchain — December 2025
Blockchain transparency is its strength and its weakness. Public ledgers expose transaction details, enabling front-running, MEV exploitation, and regulatory scrutiny. Privacy solutions like Zcash (ZK-SNARKs) or Monero (ring signatures) offer anonymity but at high computational cost and limited programmability. TEE-based protocols improve this by isolating execution, yet suffer from massive TCBs (millions of LoC), side-channel risks, and pre-quantum vulnerabilities.
TKO Protocol resolves this with a minimalist TEE runtime, proving exact code identity (Π_code), zero forbidden syscalls (Π_syscall), and zero memory violations (Π_mem) in compact, verifiable bundles.
Nodes run enclaves that self-attest compliance using Intel SGX (fine-grained memory encryption) AND TPM 2.0 (platform-wide boot chain integrity). This dual-root mitigates OS compromise — even if the OS is compromised, the enclave remains verifiable.
Optional ZK layer compresses ~1KB attestations into sub-500 byte proofs using Snarky/Bulletproofs. Enables privacy-preserving policy checks without revealing raw attestation values.
JSON envelope containing: SGX quote, TPM PCR excerpts, code hash, syscall proof, memory proof, and post-quantum signature. Verification is pure JavaScript — zero dependencies, <80ms on a phone.