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Restructured from flat .tex/.pdf files into per-paper subdirectories. Added Antje Worring as co-author on all papers. Synced PDFs to pdfs/ for download site.
126 lines
3.7 KiB
TeX
126 lines
3.7 KiB
TeX
\section{Deployment and Applications}
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\subsection{Production Deployment}
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The framework is production-deployed securing:
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\begin{itemize}
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\item \textbf{Enterprise Custody}: Multi-billion dollar institutional custody with geographic distribution of signing parties
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\item \textbf{DeFi Protocols}: Decentralized autonomous organizations (DAOs) with on-chain governance
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\item \textbf{Cross-Chain Bridges}: Threshold-controlled bridge contracts securing cross-chain asset transfers
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\item \textbf{Wallet Abstraction}: Consumer-facing MPC wallets with mobile/web interfaces
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\end{itemize}
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\subsection{Use Cases}
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\paragraph{Multi-Jurisdictional Custody} 5-of-7 threshold with parties in different jurisdictions:
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\begin{itemize}
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\item Compliance: No single jurisdiction controls keys
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\item Disaster recovery: 2 party failures tolerable
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\item Geographic distribution: US, EU, Asia locations
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\end{itemize}
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\paragraph{DAO Treasury Management} 7-of-11 threshold for large protocol treasuries:
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\begin{itemize}
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\item Security council members hold shares
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\item On-chain governance triggers signing
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\item LSS resharing for council elections
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\end{itemize}
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\paragraph{Institutional Trading} 3-of-5 threshold for high-frequency trading:
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\begin{itemize}
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\item Compliance team: 2 shares
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\item Trading desk: 2 shares
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\item Risk management: 1 share
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\item CMP presignatures for low latency
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\end{itemize}
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\paragraph{Personal Custody} 2-of-3 threshold for individual users:
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\begin{itemize}
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\item Mobile device: 1 share
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\item Hardware wallet: 1 share
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\item Cloud backup (encrypted): 1 share
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\item Doerner protocol for mobile-hardware signing
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\end{itemize}
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\subsection{Integration Examples}
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\paragraph{XRPL Bridge}
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\begin{verbatim}
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// 5-of-9 threshold controlling bridge account
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config := cmp.Keygen(curve.Secp256k1{},
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selfID, parties, 4, pool)
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// XRPL multi-sign transaction
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xrpl := adapters.NewXRPLAdapter(
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adapters.SignatureECDSA, true)
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digest, _ := xrpl.Digest(txBlob)
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// Threshold signing with 5 parties
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signature := cmp.Sign(config, signers,
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digest, pool)
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encoded, _ := xrpl.Encode(signature)
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\end{verbatim}
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\paragraph{Ethereum DAO Treasury}
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\begin{verbatim}
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// 7-of-11 FROST threshold for gas efficiency
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config := frost.Keygen(curve.Secp256k1{},
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selfID, parties, 6, pool)
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// EIP-1559 transaction
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eth := adapters.NewEthereumAdapter()
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tx := &adapters.EIP1559Transaction{
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ChainID: big.NewInt(1),
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Nonce: 42,
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// ... other fields
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}
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digest, _ := eth.Digest(tx)
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// 2-round FROST signing
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signature := frost.Sign(config, signers,
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digest, pool)
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encoded, _ := eth.Encode(signature)
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\end{verbatim}
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\paragraph{Dynamic Validator Set}
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\begin{verbatim}
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// Initial 5-of-9 validator set
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oldConfigs := lss.Keygen(curve.Secp256k1{},
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selfID, oldParties, 4, pool)
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// Add 3 new validators $\rightarrow$ 7-of-12
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newParties := append(oldParties,
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newValidators...)
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newConfigs := lss.Reshare(oldConfigs,
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newParties, 6, pool)
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// Signing continues with new set
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signature := lss.Sign(newConfigs[selfID],
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signers, message, pool)
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\end{verbatim}
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\subsection{Operational Metrics}
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\paragraph{Uptime} 99.95\% availability over 12-month period with:
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\begin{itemize}
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\item Automatic failover to backup parties
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\item LSS rollback for Byzantine fault recovery
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\item Zero downtime during membership changes
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\end{itemize}
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\paragraph{Signing Volume}
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\begin{itemize}
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\item 2M+ signatures generated in production
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\item 500-2000 signatures/day across all deployments
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\item Peak load: 50 concurrent signing sessions
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\end{itemize}
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\paragraph{Error Rates}
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\begin{itemize}
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\item Protocol failures: $< 0.01\%$ (mostly network timeouts)
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\item Identifiable aborts: 3 incidents (Byzantine parties excluded)
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\item LSS rollbacks: 12 automated recoveries
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\end{itemize}
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