Institutional-Grade Token Custody Models Using Threshold Cryptography and Hardware Isolation
Keywords:
threshold cryptography, multi-party computation, hardware security modules, digital asset custody, threshold signatures, trusted execution environments, institutional finance, cryptographic key managementAbstract
In institutional finance, digital assets need sophisticated custody solutions that meet security, availability, and regulatory compliance requirements. Single-signature custody systems concentrate operational risk, have single points of failure, and lack strong external and internal security. This study creates threshold cryptography and hardware security module-based institutional-grade digital asset custody systems. The examination covers multi-party computing protocols, threshold signature techniques like ECDSA and Schnorr, hardware-secured enclave technologies like Intel SGX and ARM TrustZone, and distributed custody systems. Cryptographic threshold mechanism secrecy, integrity, availability, and non-repudiation performance trade-offs are addressed. Institutional custody operational deployment, lifecycle management, disaster recovery, and regulatory compliance are also assessed. Defense-in-depth architecture using threshold cryptographic primitives and hardware separation prevents catastrophic key breaches while optimizing operations. Hybrid custody architectures with safe multi-party computation, threshold signature generation, and trusted execution environments outperform hot wallet and cold storage for institutional digital asset custody.
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References
A. Shamir, "How to share a secret," Communications of the ACM, vol. 22, no. 11, pp. 612-613, Nov. 1979.
R. Gennaro and S. Goldfeder, "Fast multiparty threshold ECDSA with fast trustless setup," in Proc. ACM SIGSAC Conf. Computer and Communications Security (CCS), Toronto, ON, Canada, 2018, pp. 1179-1194.
Y. Lindell, "Fast secure two-party ECDSA signing," in Proc. Annual Int. Cryptology Conf. (CRYPTO), Santa Barbara, CA, USA, 2017, pp. 613-644.
R. Canetti, R. Gennaro, S. Jarecki, H. Krawczyk, and T. Rabin, "Adaptive security for threshold cryptosystems," in Proc. Annual Int. Cryptology Conf. (CRYPTO), Santa Barbara, CA, USA, 1999, pp. 98-116.
T. P. Pedersen, "Non-interactive and information-theoretic secure verifiable secret sharing," in Proc. Annual Int. Cryptology Conf. (CRYPTO), Santa Barbara, CA, USA, 1991, pp. 129-140.
O. Goldreich, S. Micali, and A. Wigderson, "How to play any mental game," in Proc. 19th Annual ACM Symp. Theory of Computing (STOC), New York, NY, USA, 1987, pp. 218-229.
I. Damgård, V. Pastro, N. Smart, and S. Zakarias, "Multiparty computation from somewhat homomorphic encryption," in Proc. Annual Int. Cryptology Conf. (CRYPTO), Santa Barbara, CA, USA, 2012, pp. 643-662.
D. Boneh, M. Drijvers, and G. Neven, "Compact multi-signatures for smaller blockchains," in Proc. Int. Conf. Theory and Application of Cryptology and Information Security (ASIACRYPT), Brisbane, QLD, Australia, 2018, pp. 435-464.
C. Komlo and I. Goldberg, "FROST: Flexible round-optimized Schnorr threshold signatures," in Proc. Selected Areas in Cryptography (SAC), Halifax, NS, Canada, 2020, pp. 34-65.
V. Costan and S. Devadas, "Intel SGX explained," IACR Cryptology ePrint Archive, Report 2016/086, 2016.
R. Gennaro, S. Jarecki, H. Krawczyk, and T. Rabin, "Secure distributed key generation for discrete-log based cryptosystems," in Proc. Int. Conf. Theory and Applications of Cryptographic Techniques (EUROCRYPT), Prague, Czech Republic, 1999, pp. 295-310.
A. Herzberg, S. Jarecki, H. Krawczyk, and M. Yung, "Proactive secret sharing or: How to cope with perpetual leakage," in Proc. Annual Int. Cryptology Conf. (CRYPTO), Santa Barbara, CA, USA, 1995, pp. 339-352.
D. Boneh, B. Lynn, and H. Shacham, "Short signatures from the Weil pairing," in Proc. Int. Conf. Theory and Application of Cryptology and Information Security (ASIACRYPT), Gold Coast, Australia, 2001, pp. 514-532.
M. Bellare and P. Rogaway, "Random oracles are practical: A paradigm for designing efficient protocols," in Proc. 1st ACM Conf. Computer and Communications Security (CCS), Fairfax, VA, USA, 1993, pp. 62-73.
Y. Desmedt and Y. Frankel, "Threshold cryptosystems," in Proc. Annual Int. Cryptology Conf. (CRYPTO), Santa Barbara, CA, USA, 1989, pp. 307-315.
S. Josefsson and I. Liusvaara, "Edwards-curve digital signature algorithm (EdDSA)," Internet Engineering Task Force, RFC 8032, Jan. 2017.
National Institute of Standards and Technology, "Security requirements for cryptographic modules," Federal Information Processing Standards Publication 140-2, May 2001.
R. Gennaro, S. Jarecki, H. Krawczyk, and T. Rabin, "Robust threshold DSS signatures," in Proc. Int. Conf. Theory and Applications of Cryptographic Techniques (EUROCRYPT), Bruges, Belgium, 1996, pp. 354-371.
M. Drijvers, K. Edalatnejad, B. Ford, E. Kiltz, J. Loss, G. Neven, and I. Stepanovs, "On the security of two-round multi-signatures," in Proc. IEEE Symp. Security and Privacy (SP), San Francisco, CA, USA, 2019, pp. 1084-1101.
A. Boldyreva, "Threshold signatures, multisignatures and blind signatures based on the gap-Diffie-Hellman-group signature scheme," in Proc. Int. Workshop Public Key Cryptography, Paris, France, 2003, pp. 31-46.
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