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Espresso – TEE Smart Contracts

April 1, 2026

Espresso has requested that we perform a security audit of its smart-contract layer, focusing on the Solidity contracts that verify Nitro Trusted Execution Environment (TEE) attestations and enforce batch authentication for Optimism integration. Our final audit report was completed on April 1, 2026. To read the full report, including our

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Lightec – zkBTC Bridge Cryptography

April 17, 2025

Lightec requested that Least Authority review several components of the zkBTC protocol, which is a bridge between Bitcoin and Ethereum, using techniques from zero-knowledge proofs. The bridge allows a Bitcoin user to mint a zkBTC token, use this token in the Ethereum ecosystem, and eventually redeem the Bitcoin from the

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