Cyber security for fintech — focus on identity, data and third‑party risk

For fintech, cyber security should prioritise identity controls, data protection aligned to ISO 27001 and robust third‑party oversight — these three areas stop most breaches. Follow NCSC guidance, enforce MFA and encryption, and have a tested incident response plan to reduce regulatory and operational harm.

How is identity and access controlled?

Identity failures are the most common route into fintech systems. When evaluating solutions, ask whether access uses multi‑factor authentication (MFA), whether accounts employ least‑privilege, and how service accounts and APIs are separated from human logins. Practical checks include a sensible password policy, MFA for all admin and privileged accounts, and session controls on remote access.

  • Require MFA for any access to customer or payment data, not just admin accounts.
  • Use role‑based access and review permissions at least quarterly.
  • Enforce short-lived credentials for machine identities and rotate keys automatically.

Technical products (for example, Azure AD, Okta or similar identity providers) can simplify enforcement, but the commercial decision must hinge on integration with your core ledger and payroll systems and on vendor SLAs for outage and support.

How is sensitive data protected?

Data protection in fintech means more than encryption in transit — it begins with knowing what you hold. Implement a data classification scheme, minimise retention, and ensure encryption at rest and in motion. For regulatory evidence, map data flows and keep an auditable record of processing activities.

Practical checks:

  • Do you have a current data map and retention schedule?
  • Is all customer‑identifiable data encrypted using industry standards?
  • Are backups encrypted and tested regularly?

Linking technical controls to compliance helps at audit time: ISO 27001 remains a widely recognised benchmark for information security, and the NCSC publishes pragmatic advice on protecting high‑value assets and cloud workloads (NCSC’s guidance on cloud and data).

How do you manage third‑party and cloud risk?

Fintech teams outsource a lot: payment processors, KYC checks, cloud hosting, analytics. The decision criterion here is whether you can see and influence a supplier’s security posture quickly. A supplier claiming strong controls must provide evidence — an ISO 27001 certificate, a recent penetration-test summary, or a SOC 2 report — and accept contractual requirements for breach notification and audits.

  • Ask for written evidence of certifications and the date of the last independent test.
  • Require breach notification within 72 hours in contracts to align with UK GDPR obligations to report to the ICO.
  • Run continuous monitoring where possible (vulnerability feeds, endpoint telemetry).

If a provider cannot show recent evidence or refuses basic contractual clauses, treat them as higher cost risk. For help mapping controls to supplier risk, see Aurora’s cyber security page for practical services and assessments.

How quickly can you detect and respond?

Outcomes matter: detection speed and response quality determine downtime, customer impact and regulatory exposure. Check whether a candidate can provide centralised logging, 24/7 alerting, and runbooks for common incidents. Also confirm testing cadence: tabletop exercises and full playbooks should be exercised on a schedule.

Minimum expectations: maintain logs for at least 90 days for security investigations; test the incident response plan annually; and measure mean time to detect (MTTD) and mean time to respond (MTTR) as procurement KPIs.

Technical choices (SIEM/EDR, managed detection, or fully in‑house) depend on staffing. Smaller fintechs often favour a managed detection service to get expert coverage without hiring a full security ops team.

Applying these criteria when comparing options

When you shortlist vendors or decide internal priorities, score each on the four criteria above: identity, data, third‑party, detection/response. Use simple pass/fail for must‑have items (MFA, encryption, 72‑hour breach notification) and a 1–5 score for maturity elements (logging, tabletop frequency, supplier audit evidence). Pick the option that delivers acceptable risk reduction within your budget and can show measurable KPIs within 90 days.

Concrete next step: run a 1‑day gap assessment against these criteria, prioritise up to five remediation tasks, and schedule the first tabletop for the quarter. That delivers faster calm, clearer audit evidence and materially lower operational risk.

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FAQ

How long does it take to implement MFA and basic encryption across a small fintech?

Rolling out MFA and basic encryption typically takes about 4–12 weeks, depending on integrations and legacy systems; full data classification and remediation commonly stretch to 3–6 months.

Which UK regulator should a fintech check first for data rules?

Start with the ICO for data protection and UK GDPR obligations; ensure you can produce records of processing activities and Data Protection Impact Assessments for high‑risk services.

What should I ask payment or KYC suppliers before integration?

Request ISO 27001 or SOC 2 documentation, a summary of the last penetration test (date and findings), and contractual breach notification within 72 hours plus liability and indemnity terms.

Can a small fintech afford enterprise security without hiring a big team?

Yes — by prioritising controls (MFA, patching, backups, logging) and using managed services for detection and incident response you can achieve high coverage without a large internal security ops headcount.