Security Scanning for Fintech: Payment & API Protection

Fintech Security Requirements

Fintech companies handle sensitive financial data and are subject to strict regulatory requirements. Security isn't optional — it's a market requirement for customer trust, partnership agreements, and regulatory compliance.

PCI DSS Alignment

If you process, store, or transmit payment card data, PCI DSS compliance is mandatory. Key requirements:

• Requirement 5: Protect systems against malware
• Requirement 6: Develop and maintain secure systems — includes regular vulnerability scanning
• Requirement 11: Regularly test security systems — quarterly ASV scans and annual penetration testing

Payment API Hardening

• Never log full card numbers, CVVs, or sensitive authentication data
• Tokenize payment data as early as possible in the flow
• Implement transaction amount limits and velocity checks
• Use separate API keys for different transaction types
• Monitor for unusual transaction patterns (fraud detection)

API Security for Financial Services

Financial APIs require enhanced security beyond standard API best practices:

• Mutual TLS (mTLS): Both client and server authenticate via certificates
• Request signing: HMAC or RSA signatures for request integrity
• Idempotency: Prevent duplicate transactions from retried requests
• Audit trails: Complete transaction logging for regulatory compliance

Regulatory Scanning Requirements

Regulation	Scanning requirement	Frequency
PCI DSS	ASV scan + pentest	Quarterly + Annual
SOX	IT controls testing	Annual
State regulations	Risk assessment	Varies

Getting Started

Beta Security provides automated vulnerability scanning that maps findings to PCI DSS and other regulatory frameworks. Our reports are designed for both engineering teams (technical details) and auditors (compliance mapping).