Banks & Financial Institutions — Blockchain security for a bank is the assurance work that lets a regulated institution put balance-sheet assets, client assets or settlement flow onto distributed ledger infrastructure — covering the code, the custody model, the operational controls and the evidence the institution needs to defend the decision internally and externally.
A bank does not buy an audit for the same reason a DeFi protocol does. A protocol buys risk reduction before a public launch. A bank buys a defensible position: something the second line of defence can review, internal audit can test, the regulator can be shown, and the executive who signed the mandate can point to when asked why this was safe enough to do. The technical work has to be excellent and it also has to be legible to people who will never read Solidity.
The risk profile is different too. Institutional blockchain deployments are rarely the anonymous adversarial free-for-all that public DeFi is. They are permissioned or semi-permissioned, with known counterparties, and the realistic threats are a compromised operator key, an integration between the ledger and a core banking system, an over-privileged administrator, a settlement finality assumption that does not survive a reorg, and a control that exists on paper but not in the deployment. Those are the areas we spend time on.
We work in the way institutional engagements already run: NDA first, scoped statement of work, named engagement lead, weekly status, findings raised as they are found rather than saved for the report, and a deliverable structured for three readers — the engineering team who must fix it, the risk function who must rate it, and the auditor or regulator who must be satisfied that it was rated honestly.
We fix a commit hash, agree the in-scope contracts and read your architecture docs, then build a threat model: who the actors are, what the trust boundaries are, and which invariants must never break. Nothing is reviewed against assumptions we have not written down.
Line-by-line review by at least two auditors working independently, focused on authorisation, accounting, upgrade paths, external integrations and the gap between what the code does and what the documentation claims it does. Most critical findings come from this phase, not from tooling.
Static analysers appropriate to the language, plus property-based fuzzing and invariant testing to push the system into states no unit test covers. Tooling is used to widen coverage, never to replace the manual pass.
Candidate findings are proven on a forked network with a working proof of concept. We report what an attacker can actually do and what it costs them, not a theoretical severity label.
Every finding gets a severity rating, reproduction steps, the affected code, the impact in concrete terms and a specific remediation. You get a draft for discussion before anything is finalised.
We re-test every remediation against the original proof of concept and check that the fix has not opened a new path. The final report is yours to publish.
Because the vendor's audit covers the vendor's code, not your deployment, your configuration, your key custody, your integrations or your operational controls — which is where institutional incidents actually occur. Vendor assurance is an input to your review, not a substitute for it.
Yes. NDAs, security questionnaires, due-diligence packs, insurance evidence, defined SLAs and named-personnel requirements are standard on these engagements.
We produce the technical evidence a supervisor expects to see: documented scope, methodology, qualified testers, rated findings, remediation and verification. Whether a specific regime accepts a specific artefact is a question for your counsel and supervisor — we structure the work so that conversation is straightforward.
Yes. Permissioned deployments have their own failure modes — endorsement policies satisfiable by aligned parties, over-privileged administrators, and integration layers reachable from the corporate network. See our enterprise blockchain and DLT audit.
Named testers only, access scoped to what the engagement requires, evidence held in systems you approve, and destruction or return of material on completion. Intrusive testing happens against mirrored environments unless a production window is agreed in writing.
A repository or contract address, a commit hash to freeze the scope, whatever architecture or spec documentation exists, and a point of contact who can answer design questions. If documentation is thin we will write our understanding of the system back to you and ask you to confirm it — that step alone catches design-level bugs.
A single token contract is 24–48 hours. A typical dApp or mid-sized protocol runs one to two weeks. Large DeFi systems, L2s, bridges and ZK circuits are scoped per project after we have seen the code. We will give you a fixed timeline with the quote, not an estimate that moves.
Send the repository and a commit hash through the contact form, message @bugtester25 on Telegram, or book a 30-minute scoping call. 200+ protocols audited · $4B+ secured · 0 hacks post-audit. Prefer email? info@safeedges.in.