Crypto Custody

Secure Safekeeping
& Administration

Custody and administration of crypto-assets covering safekeeping and secure management of assets or private keys on behalf of customers, with operational administration around balances and transfers.

Custody Building Blocks

Safekeeping & Key Management

Secure storage and control of keys and wallet access with enterprise-grade security.

  • Policy-based access controls
  • Multi-approval workflows
  • HSM and secure module integration
  • Key rotation and recovery

Transfer Operations

Handling deposits, withdrawals, and operational approvals for on-chain movements.

  • Deposit detection and processing
  • Withdrawal request handling
  • Address whitelisting
  • Multi-signature approvals

Administration & Reconciliation

Maintaining customer positions, audit trails, and reporting with full transparency.

  • Customer position management
  • Complete audit trails
  • On-chain/off-chain reconciliation
  • Regulatory reporting support

Security & Controls

Comprehensive security framework with segregation of duties and monitoring.

  • Segregation of duties
  • Role-based access control
  • Real-time monitoring
  • Incident response procedures

Hot/Cold Wallet Operating Model

Cold Storage

95%

Majority of assets secured in offline, air-gapped storage with maximum security protocols.

  • Air-gapped signing
  • Multi-party authorization
  • Geographic distribution
  • Time-locked withdrawals
Controlled Transfers

Hot Wallet

5%

Day-to-day liquidity for operational needs and customer withdrawals.

  • Fast settlement
  • Automated replenishment
  • Real-time monitoring
  • Rate limiting controls

Enterprise-Grade Security Controls

Segregation of Duties

Clear separation between roles that initiate, approve, and execute transactions to prevent unauthorized actions.

Access Control

Granular role-based permissions ensuring users only access functions required for their responsibilities.

Real-Time Monitoring

Continuous monitoring of all activities with automated alerts for suspicious or unusual patterns.

Incident Response

Structured procedures for detecting, responding to, and recovering from security incidents.

Periodic Reviews

Regular security assessments, audits, and penetration testing to identify and address vulnerabilities.

Audit Trails

Immutable logs of all actions for compliance, forensics, and regulatory reporting requirements.

Balance Administration & Reserve Management

In the custody model, customer balances can be maintained off-chain while NEXUS holds and secures the underlying assets. Buy/sell activity processed as accounting movements with on-chain activity focused on treasury operations.

Off-Chain Balance Administration

Maintaining customer positions with clear audit trails and operational reporting for full transparency.

Reserve Concepts

Supporting treasury structures such as exchange liquidity, hot wallets, and cold storage allocations.

Controlled Withdrawals

Operational handling of withdrawals with policies, approvals, and whitelisting for security.

Reconciliation

Automated reconciliation between on-chain holdings and off-chain customer records.

Day-to-Day Custody Operations

Deposit Handling

Automated detection and crediting of incoming deposits with confirmation tracking.

Withdrawal Processing

Secure withdrawal workflows with multi-level approvals and whitelisting.

Whitelisting

Address verification and whitelisting for secure transfers to approved destinations.

Treasury Ops

Rebalancing between hot/cold storage and managing liquidity reserves.

Launch Crypto Custody Services

Provide secure safekeeping and administration of crypto-assets with enterprise-grade infrastructure and controls.

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