Digital Asset Security: Custody/Sub Custody

U.S. Bank National Association • Cincinnati, OH

48d • Onsite

About The Position

At U.S. Bank, we’re on a journey to do our best. Helping the customers and businesses we serve to make better and smarter financial decisions and enabling the communities we support to grow and succeed. We believe it takes all of us to bring our shared ambition to life, and each person is unique in their potential. A career with U.S. Bank gives you a wide, ever-growing range of opportunities to discover what makes you thrive at every stage of your career. Try new things, learn new skills and discover what you excel at—all from Day One.
Job Description
U.S. Bank is seeking a Digital Asset Security: Custodial/Sub Custodial Engineer with demonstrated competence and experience in blockchain Custodial and Sub-Custodial security to contribute toward the success of our Digital Assets Information security program. In this role, you will represent Information Security Services (ISS) and partner with business, innovation, and technology teams to spearhead the design and engineering of Information security controls and guardrails for Secure Multi-Party Computation (MPC), Multi-Party Signatures, ZKP and related algorithms, protocols, schemes etc., for secure Custody / Sub-Custody of Digital Assets, Cryptocurrencies, Stable Coins and Tokens.

Requirements

• 2+ years of hands-on Secure Multi-Party Computation design or engineering experience for the security of Hierachircal Deterministic (HD) Wallets at a financial institution with a vendor solution (e.g., Fire Blocks, IBM DA Haven, Metaco, Gnosis Safe or Grainte).
• M.S. or PhD degree in Computer Science, Mathematics or related field.
• This role requires strong technical knowledge of Shamir’s Secret Sharing (SSS), ZKP, ECDSA/EdDSA TSS algorithms and protocols.
• In-depth knowledge of at least one of the mainstream Multi-Party Computation protocols (e.g., Gągol-Kula-Straszak-Świętek , Lindell-Nof-Ranellucci, Canetti-Makriyannis-Peled, Damgard-Jakobsen-Nielsen-Illeborg-Pagter-Østergaard’ or Doerner-Kondi-Lee-shelat).
• 2+ years of hands-on Secure Multi-Party Computation design or engineering experience for the security of Hierachircal Deterministic (HD) Wallets at a financial institution with a vendor solution (e.g., Fire Blocks, IBM DA Haven, Metaco, Gnosis Safe or Grainte).
• This role requires working from a U.S. Bank location three (3) or more days per week.

Responsibilities

• Work closely with innovation, technology, and business teams involved with Custodial and Sub-Custodial initiatives and parties designing and engineering U.S. Bank Digital Asset Custody eco-system to formulate Information Security controls and guardrails for: Computation Complexity – to ensure security of the authentication and authorization of custody transactions.
• Round Complexity – to secure the sequence order of the crypto transactions (constant vs. variable).
• Communication Complexity - to secure protocols during the transaction (synchronous vs. asynchronous approval schemes).
• Lead secure design and engineering practices for Hierarchical Deterministic (HD) Wallets, Key Storage (Cold, Warm and Hot), Key Distribution aspects for Hardened and Non-Hardened Child Keys and associated ECDSA/EdDSA Threshold Signature Schemes for: Quorum Approval Thresholds - minimum number of parties needed to decrypt the cipher text to generate the signature.
• Key Share Regeneration: number of parties required for private key share generation from key shards.
• Counter Party Threshold: number of corrupt parties to sustain secure operations (Honest vs. Dishonest/Corrupt).
• Partner with Information Security Services teams to develop Information security frameworks and guidelines for addressing various Custody and Sub-custody requirements and help guide and support on routine basis.

Benefits

• Healthcare (medical, dental, vision)
• Basic term and optional term life insurance
• Short-term and long-term disability
• Pregnancy disability and parental leave
• 401(k) and employer-funded retirement plan
• Paid vacation (from two to five weeks depending on salary grade and tenure)
• Up to 11 paid holiday opportunities
• Adoption assistance
• Sick and Safe Leave accruals of one hour for every 30 worked, up to 80 hours per calendar year unless otherwise provided by law

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level