Private Key & Signing Architecture Review
A security-focused review of how an application stores credentials, authorizes actions and limits damage if a component is compromised.
From $1,000 · final quote before payment
What's included
- Signing-flow and trust-boundary diagram
- Secret storage and access review
- Hot-wallet and transaction-limit assessment
- KMS, HSM or MPC integration options
- Prioritized remediation report
Best fit for
- Custody-sensitive applications
- Trading and payment software
- Teams preparing for launch
Reduce the signing blast radius
We review where keys can be accessed, which components can request signatures and what limits remain if a server or operator account is compromised. Recommendations may include isolated signers, policy checks, withdrawal restrictions, rotation and emergency shutdown procedures.
This is a technical architecture review, not a certification or legal compliance opinion.
Delivery and operational boundaries
TierZero provides software engineering, testing, documentation and deployment support. The client controls its infrastructure, accounts, credentials, wallets and product decisions. We do not custody client or end-user assets, transmit funds on a client's behalf, operate customer trading accounts, recommend specific investments or guarantee financial results. Production use remains subject to the client's legal, compliance and risk review.
Technical scope
What we design and verify
A production private key & signing architecture review is more than a working demo. Each major component below is scoped around the target network or platform, expected load, failure conditions and the way your team will operate it after handover.
Signing-flow and trust-boundary diagram
This part of Private Key & Signing Architecture Review is specified as a separate, testable component with acceptance criteria, logging and documented configuration rather than hidden hard-coded behavior.
Secret storage and access review
This part of Private Key & Signing Architecture Review is specified as a separate, testable component with acceptance criteria, logging and documented configuration rather than hidden hard-coded behavior.
Hot-wallet and transaction-limit assessment
Submission and execution logic includes simulation, configurable limits, explicit failure states and structured logs. Production credentials and signing authority remain separated from application logic.
KMS, HSM or MPC integration options
This part of Private Key & Signing Architecture Review is specified as a separate, testable component with acceptance criteria, logging and documented configuration rather than hidden hard-coded behavior.
Prioritized remediation report
This part of Private Key & Signing Architecture Review is specified as a separate, testable component with acceptance criteria, logging and documented configuration rather than hidden hard-coded behavior.
Definition of done
Before delivery, we validate the agreed happy path, expected failures and operational controls. You receive the applicable source code, configuration reference, deployment instructions and a walkthrough of the system. Any third-party fees, infrastructure subscriptions or external dependencies are identified during scoping.
Delivery
How the engagement works
Technical discovery
We confirm the objective, constraints, integrations and acceptance criteria.
Architecture & scope
You receive milestones, responsibilities, timeline and the final quote.
Build & verification
Implementation is tested against the agreed scenarios with visible progress.
Handover & support
We deploy or hand over the code, documentation and operating instructions.
Built for production
Scope, security and ownership
Delivery model
The engagement starts with evidence gathering and ends with prioritized, implementable recommendations.
Security baseline
Access is time-limited and findings are delivered privately with clear severity and remediation guidance.
What we need from you
The system boundary, current architecture, known risks and the decisions the review needs to support.
Questions before you start
What is included in the Private Key & Signing Architecture Review starting price?+
The $1,000 figure is a starting point. We confirm the exact scope, integrations, acceptance criteria and fixed quote before work begins. The listed deliverables are included unless the agreed proposal says otherwise.
How long does delivery take?+
Timing depends on integrations, testing depth and whether existing code is involved. After a short technical discovery, we provide milestones and a delivery estimate before payment.
Who controls the source code, infrastructure and keys?+
The agreed source code and deployment are handed over to the client. Production wallets, seed phrases and private keys remain client-controlled; we design integrations around scoped credentials and least-privilege access.
How do we verify the result?+
We agree measurable acceptance criteria before implementation, then provide testing evidence, documentation and a handover walkthrough for the delivered scope.
Can you work with our existing code or infrastructure?+
Yes. We can begin with a focused review, identify reusable components and propose the smallest safe implementation path instead of forcing a full rebuild.
Technical resources
Related guides
Private Key Management for Solana Bots: HSM vs Vault vs Env Vars
Compares hardware security modules (YubiHSM 2), HashiCorp Vault transit secrets, and plaintext env vars for storing Solana signer keys, covering operational cost, latency impact on HFT throughput, and minimum-viable key rotation procedures.
Read guide InfrastructureSecrets & Key Management with Vault for Crypto Trading Bots
Vault secrets management for trading bot keys: inject hot-wallet keys and API creds at runtime, sign with transit, and rotate dynamic secrets without touching disk.
Read guide InfrastructureJito Bundles and Private Mempool: MEV Bot Infrastructure on Solana
How Jito's block engine and bundle auction work at the infrastructure level, and what your bot needs to submit competitive bundles without wasting compute. Covers tip selection, bundle landing rates, and monitoring rejected bundles.
Read guideRelated services
Get a practical scope, not a sales pitch
Tell us the target network or platform, required integrations, expected load and what you already have. We'll reply with the next technical questions, delivery plan and quote.