Role-Based Access Control (RBAC) for Digital Assets
The Executive Verdict
Introduction: The "God Mode" Liability
In retail wallets, the user is God. In corporate, this is a vulnerability. Security architecture is built on the "Principle of Least Privilege": You do not trust users; you trust Roles. Theft or error should require Collusion.
1. The Hierarchy: Defining the Four Roles
2. The Workflow: The "Four Eyes" Principle
Preparation (Maker) -> Notification -> Verification (Checker 1) -> Execution (Checker 2) -> Settlement. At least two pairs of eyes must review every transaction.
A swimlane diagram showing the handoff between Maker, Checker 1, Checker 2, and the Blockchain.
3. The Policy Engine: Logic over Humans
RBAC is reinforced by Code Rules. Policy A: Velocity Limit (<$5k = 1 signer, >$5k = 2 signers). Policy B: Whitelist Lock (Makers can only send to verified vendors). Policy C: Time-Lock (24h delay for >$1M).
4. Implementation: Safe vs. MPC
Safe is natively flat; RBAC requires governance modules (Zodiac) or frontends (Den/Coinshift). MPC (Fireblocks) has RBAC built into the core server (Shard B), making it impossible to bypass via frontend.
5. The "Super-Admin" Risk
Who controls the Admin? The Admin Role should be a Quorum. Adding a new user should require CFO approval. No single dictator.
6. Offboarding: The Kill Switch
In single-key, offboarding is a crisis (move funds). In RBAC, you simply Revoke the Role. HR notifies Admin -> Admin suspends User -> Auditor reviews logs.
7. Audit & Compliance (SOC 2)
Auditors need the Access Control Matrix. They verify Segregation of Duties (Auditor != Approver) and Activity Logs. You cannot pass SOC 2 with a shared Ledger.
Conclusion: Trust the Process, Not the Person
Enterprises run on controls. RBAC allows you to scale your team without scaling your risk. Theft should require collusion.
F.A.Q // Logical Clarification
Can a "Maker" also be a "Checker"?
"Software allows it, but it violates Segregation of Duties. Avoid unless team is tiny."
What if Approvers are on vacation?
"Use a Quorum (e.g., 2-of-4). Ensure redundancy in authorized signers."
Does RBAC work for NFTs?
"Yes. NFTs are assets. Policies can restrict listing prices."
Is RBAC on-chain?
"MPC: Off-Chain (Server). Safe: On-Chain (Thresholds), though complex roles are often interface-managed."
Module ActionsCW-MA-2026
Institutional Context
"This module has been cross-referenced with Operations & Security / Access Control standards for maximum operational reliability."