In an industry built on trust, security, and regulatory compliance, Public Key Infrastructure serves as the cryptographic backbone of modern financial services. From retail banking and payment systems to capital markets and insurance operations, PKI enables secure transactions, protects customer data, and demonstrates regulatory compliance in an increasingly digital financial ecosystem.

At Unsung, we deliver PKI solutions that enable financial institutions to operate securely, meet evolving regulatory requirements, and maintain the trust that underpins every customer interaction and transaction.

Enabling Secure Financial Operations

Financial services organisations face unprecedented cyber threats, regulatory scrutiny, and customer expectations for digital-first experiences. PKI provides the foundation for:

Payment Security and Transaction Integrity — Certificate-based authentication and encryption secure online banking, mobile payments, ATM networks, and point-of-sale systems. PKI ensures transaction authenticity, protects payment data, and prevents man-in-the-middle attacks across payment infrastructures.

Strong Customer Authentication — Meeting PSD2 and SCA requirements demands multi-factor authentication that goes beyond passwords. PKI enables certificate-based authentication for digital banking, protecting customer accounts while delivering frictionless user experiences. Digital certificates provide the underlying trust model for these interactions.

API Security and Open Banking — As financial institutions expose APIs for third-party integrations and open banking initiatives, PKI provides mutual TLS authentication, ensuring only authorised applications and partners can access sensitive financial data and services.

Cloud and Digital Transformation — Migration to cloud platforms and adoption of containerised workloads requires dynamic, automated certificate management. PKI secures cloud infrastructure, encrypts data in transit and at rest, and authenticates microservices at scale. Automated certificate lifecycle management is essential to keeping pace with ephemeral cloud environments.

Document Signing and Non-Repudiation — From loan agreements and insurance policies to regulatory filings and audit reports, digital signatures provide legally binding authentication and tamper-evidence, streamlining workflows while maintaining compliance and audit trails.

IoT and Connected Devices — ATMs, payment terminals, kiosks, and connected insurance devices require secure identity and encrypted communications. PKI enables automated certificate lifecycle management for distributed device estates.

Addressing Financial Services Challenges

The financial sector operates under some of the most demanding security and compliance frameworks of any industry. Unsung understands the challenges of:

Regulatory compliance including PSD2, GDPR, PCI-DSS, SOX, MiFID II, and sector-specific requirements from the FCA, PRA, and European regulators.

Legacy system integration where modern PKI must coexist with decades-old core banking and insurance platforms. For organisations managing legacy Microsoft CA infrastructure, our analysis of Active Directory Certificate Services in modern IT explores the challenges and alternatives.

Third-party risk management across complex supply chains, fintech partnerships, and outsourced operations.

Operational resilience with zero tolerance for certificate outages that could disrupt customer-facing services or trading operations.

Rapid threat evolution requiring cryptographic agility and readiness for post-quantum cryptography.

Our approach combines technical excellence with a practical understanding of financial services operations, risk appetite, and the commercial pressures of highly competitive markets.

The G7 Cyber Expert Group has set 2035 as the target date for completing the migration to quantum-resistant cryptography across financial services. With the NIST PQC roadmap setting deprecation of RSA and ECC by 2030, the window for orderly transition is finite. A cryptographic bill of materials is the foundational step in understanding which algorithms, certificates, and keys underpin your most critical financial systems — and which need to be migrated first. The harvest now, decrypt later threat makes this especially pressing for institutions holding customer data and transaction records with long regulatory retention requirements.

Our Financial Services PKI Capabilities

Enterprise PKI Architecture — We design scalable, resilient certificate infrastructures that support diverse use cases across retail banking, corporate banking, trading platforms, insurance systems, and back-office operations — from on-premises deployments to hybrid and multi-cloud architectures. Our PKI design and build service covers the full architecture lifecycle.

Payment System PKI — Specialist expertise in securing payment infrastructures including ATM networks, card payment systems, and real-time payment platforms. We ensure compliance with PCI-DSS and payment scheme requirements while enabling operational efficiency. Cryptographic keys for payment processing should be protected within hardware security modules.

Certificate Lifecycle Automation — Financial institutions often manage hundreds of thousands of certificates across web servers, applications, devices, and user authentication. We implement automated discovery, provisioning, renewal, and revocation workflows that reduce operational risk and manual overhead. For a comparison of the protocols that enable this automation — CMP, ACME, EST, and SCEP — see our detailed guide.

PKI Health Checks and Risk Assessment — Our comprehensive PKI health checks evaluate certificate environments against regulatory requirements, industry best practice, and operational risk. We identify vulnerabilities, expired certificates, weak cryptography, and governance gaps — delivering prioritised remediation roadmaps.

Regulatory Compliance Support — We develop governance documentation, Certificate Policies, and compliance mapping that demonstrate how PKI controls meet regulatory obligations. Our PKI consultancy provides audit-ready evidence and supports regulatory reporting requirements.

Post-Quantum Readiness — As the financial sector prepares for quantum computing threats, we provide strategic guidance on cryptographic inventory, algorithm migration planning, and hybrid PKI architectures that protect long-lived financial data. Platforms such as Crypto4A QxHSM enable testing of quantum-resistant algorithms now, within assured environments.

Managed PKI Services — From monitoring and incident response to certificate operations and governance support, we provide comprehensive managed PKI services that allow financial institutions to focus on core business while maintaining the highest standards of cryptographic security.

Why Unsung for Financial Services PKI?

Unsung brings vendor-neutral expertise and a proven track record of delivering PKI solutions in regulated, high-stakes environments. We understand that financial services organisations require partners who combine technical depth with commercial pragmatism and regulatory awareness.

Outcome-focused consulting aligning PKI initiatives with business objectives, risk reduction, and regulatory compliance — not just technical implementation.

Vendor neutrality ensuring solution recommendations are based on your requirements, not product relationships.

Regulatory expertise with experience supporting compliance with FCA, PRA, PCI-DSS, GDPR, and international financial regulations.

Operational excellence including automation, monitoring, and lifecycle management that reduces risk and operational cost.

Flexible engagement models from strategic advisory and design authority through to full-service PKI operations.

Whether implementing PKI for open banking APIs, securing payment infrastructures, modernising legacy authentication systems, or preparing for post-quantum cryptography, Unsung provides the specialist knowledge and delivery capability that financial services organisations require.

Clients We Have Worked With

We are proud to work with clients including NCR Atleos, delivering PKI solutions that secure financial technology and payment systems.

Our Recent Projects

Payment Infrastructure PKI Modernisation — Design and implementation of automated certificate lifecycle management for global ATM and payment terminal networks.

Enterprise PKI Health Check for Banking Group — Comprehensive assessment of certificate environments across retail and corporate banking platforms, identifying risk and delivering compliance-aligned remediation roadmaps.