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Industry

Technology and security for banking and financial services

Financial institutions run decades-old core systems next to real-time payment rails, mobile apps and partner APIs, under close supervision. Onion Infosec builds, secures and operates technology for that environment.

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Sector
Banking & Financial Services
Segments
Banking, Capital markets, Payments and fintech, Lending

01Context

Financial institutions hold what attackers want most: money, personal data and the trust that keeps a financial system working.

A security failure here is a business event, a board event and a regulatory event at the same time.

The technology is mixed. Core banking and trading systems that are decades old connect to real-time payment rails, mobile apps and open APIs. Fintechs and lenders release quickly on cloud infrastructure that moves real money, while partner banks and enterprise customers ask for evidence of control before contracts are signed. Every join between old and new is a place where controls can fail.

02Technology

What the sector builds and runs.

Core and payment modernization
API layers in front of core banking, payment scheme integrations and staged migration of legacy workloads to cloud, planned so that settlement and reporting are not interrupted.
Customer-facing products
Mobile and web banking, onboarding and KYC flows, lending journeys and partner APIs, with threat modeling and security testing inside the delivery pipeline.
AI in regulated workflows
Document processing, fraud and risk models and internal assistants, built with data controls, evaluation and audit trails that a model risk or compliance function can review.
Operations under change control
Cloud platforms, identity, endpoint management, 24×7 monitoring and support, run with the change records and evidence that supervisors and auditors ask to see.

03Risk

The risks that matter most.

Intrusion aimed at payment fraud
Actors who specialize in access to payment switches, interbank messaging infrastructure and transaction manipulation, and who exploit gaps in reconciliation.
Credential and session theft
Phishing and token theft against staff who can move money or read customer records, and credential stuffing against customer channels.
API abuse and business-logic fraud
Payment flows, onboarding checks and transaction limits probed by financially motivated actors who look for logic errors, not software bugs.
Third-party concentration
Core banking vendors, payment processors, cloud providers and fintech integrations extend the attack surface beyond the institution’s direct control.

04Regulation and assurance

What you may need to demonstrate.

PCI DSS covers cardholder data and the SWIFT Customer Security Controls Framework covers interbank messaging. DORA in the EU, GLBA in the United States and GDPR set expectations for resilience testing, third-party oversight, data protection and incident reporting. Regional supervisors add their own rules, for example RBI directions and SEBI CSCRF in India. Partners commonly ask for SOC 2 and ISO 27001 as well.

  • PCI DSS
  • SWIFT CSCF
  • DORA
  • GLBA
  • ISO 27001
  • SOC 2
  • NIST CSF
  • RBI cyber security directions
  • SEBI CSCRF

Which of these apply depends on where you operate and what you do. We scope against your actual obligations.

Framework library

05Where we usually start

Services that matter most here.