DTMF Masking: Keypad Security Guide | Paytia

Dual-tone multi-frequency (DTMF) signals are the audible tones generated when customers press phone keys. Without protection, anyone listening-live or via recording-can decode the card number. DTMF masking replaces those tones with flat audio while preserving the agent conversation.

How Paytia implements DTMF masking

When a customer enters digits, Paytia’s secure platform captures them directly and sends masked audio back through the call. Agents hear a consistent tone, maintaining rapport without exposing card data.

Compliance advantage

This control aligns with PCI DSS guidance on preventing storage of sensitive authentication data and restricting access to cardholder data. It keeps recordings usable for quality assurance.

Business outcomes

• Secure payments from any location.
• Minimal training overhead-agents follow the same conversational flow.
• Reduced audit scope thanks to certified processing.

Want to hear DTMF masking in action? Book a demonstration or talk with our team.