Introducing Whsipder — Zero Trust for Telecom
We built Whsipder because the telecom industry is still fighting robocalls with static blocklists. Today we're introducing a different approach — multi-layer adaptive scoring, infrastructure fingerprinting, and real-time audio AI.
Robocalls aren't slowing down. The tools supposed to stop them — number blacklists, IP reputation, STIR/SHAKEN attestation — were built for a world where attackers don't adapt. But they do. Numbers rotate in minutes. Infrastructure spins up daily. Attestation gets spoofed. The industry needs something fundamentally different.
That's why we built Whsipder.
What Whsipder does
Whsipder is a lightweight SIP media proxy that sits at the network edge. Every call — inbound or outbound — passes through multiple independent detection layers running in parallel. Identity verification, behavioral analysis, infrastructure fingerprinting, threat intelligence, and GPU-accelerated audio AI. The result is a composite score computed in under 50 milliseconds that determines whether the call is allowed, challenged, or blocked.
No changes to your softswitch. No changes to your dial plans. Point your trunks at Whsipder and every call gets scored before it connects.
Why infrastructure fingerprinting matters
The core insight behind Whsipder is simple: attackers can rotate numbers and IPs, but they can't rotate their entire infrastructure on every call. Every SIP stack, dialer, and proxy chain leaves protocol-level artifacts — timing characteristics, header patterns, codec preferences, SDP structures. These form a fingerprint that persists even when everything else changes.
When a fingerprint accumulates bad behavior — high velocity, sequential dialing, honeypot triggers — its reputation degrades across the entire network. The attacker's next call from that infrastructure is already flagged, regardless of what number or IP it uses.
Both directions
Whsipder protects outbound and inbound. Outbound scoring stops robocalls from leaving your network — protecting your reputation, reducing traceback complaints, and keeping you compliant. Inbound protection guards your agents and employees from vishing attacks, spoofed customer numbers, deepfake voices, and social engineering scripts.
What's next
This blog is where we'll share what we're learning — detection strategies, threat intelligence, compliance updates, and technical deep-dives into the engineering behind Whsipder. If you're a carrier, bank, or enterprise dealing with voice fraud, we're building this for you.
More soon.