Sealed-Bid Auctions via TEE-Backed Confidential Compute Blockchains
Sealed-bid auctions ensure fair competition and efficient allocation but are often deployed on centralized infrastructure, enabling opaque manipulation. Public blockchains eliminate central control, yet their inherent transparency conflicts with the confidentiality required for sealed bidding. Prior attempts struggle to reconcile privacy, verifiability, and scalability without relying on trusted intermediaries, multi-round protocols, or expensive cryptography. We present a sealed-bid auction protocol that executes sensitive bidding logic on a Trusted Execution Environment (TEE)-backed confidential compute blockchain while retaining settlement and enforcement on a public chain. Bidders commit funds to enclave-generated escrow addresses, ensuring confidentiality and binding commitments. After the deadline, any party can trigger resolution: the confidential blockchain determines the winner through verifiable off-chain computation and issues signed settlement transactions for execution on the public chain. Our design provides security, privacy, and scalability without trusted third parties or protocol modifications. We implement it on SUAVE with Ethereum settlement, evaluate its scalability and trust assumptions, and demonstrate deployment with minimal integration on existing infrastructure.
| Attribute | Value |
|---|---|
| Address | Taipei, Taiwan |
| Authors | Jonas Gebele, Timm Mutzel, Burak Öz, Florian Matthes |
| Citation | Gebele, J.; Mutzel, T.; Öz, B.; Matthes, F.: (2025). Sealed-Bid Auctions via TEE-Backed Confidential Compute Blockchains. Proceedings of the 2025 Workshop on Decentralized Finance and Security, Pages 16-26. |
| Key | Ge25 |
| Research project | |
| Title | Sealed-Bid Auctions via TEE-Backed Confidential Compute Blockchains |
| Type of publication | Workshop |
| Year | 2025 |
| Team members | M |
| Publication URL | https://dl.acm.org/doi/pdf/10.1145/3733815.3764043 |
| Project | |
| Acronym | DEFI'25 |