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Whsipder
zero trust for telecom
Inbound Protection

Protect your agents
from malicious vishing.

Attackers spoof customer phone numbers to trick bank agents into pushing wires, resetting credentials, and authorizing fraudulent transactions. They clone executive voices to phish employees for one-time codes and internal tool access. Whsipder sits on the inbound path and kills these attacks before the phone rings.

Request a DemoSee Protection Layers
16
Scoring layers
Callback
Spoof verification
GPU
Deepfake detection
Zero-trust
Every inbound call
Same proxy. Now facing inbound. Protecting your people.
Whsipder sits in front of your SIP trunks and scores every incoming call before it reaches an agent, a banker, or an employee. Spoofed customer numbers get verified. Deepfake voices get caught. Social engineering scripts get flagged mid-sentence. Your team only talks to real people.
Agent & Employee Protection

Your agents are the target. Protect them.

Fraudsters call banks pretending to be account holders. They call help desks pretending to be employees. They spoof the caller ID to match the real person's number, then social-engineer the agent into wiring funds, resetting passwords, or leaking one-time codes. Whsipder scores every inbound call before it connects.

Spoofed customer numbers
An attacker calls your bank from a spoofed number matching a real account holder. Your agent sees the right caller ID, trusts it, and processes a wire transfer. Whsipder catches the spoofed number before the agent ever picks up — multi-layer attestation validation, infrastructure fingerprinting, and behavioral analysis combined.
Employee phishing for OTPs
Attackers call employees pretending to be IT support or a manager, pressuring them to read out one-time codes for internal tools, VPNs, or admin panels. Whsipder detects the spoofed origination, flags the call as suspicious, and triggers callback verification before the employee hears a ring.
Wire fraud prevention
The #1 target: bank call centers. An attacker spoofs a high-value customer's number, passes basic verification questions (leaked from breaches), and instructs the agent to push a wire. Whsipder's scoring engine + callback verification stops the call before the agent can be manipulated.
Network-wide intelligence
If a number or infrastructure fingerprint has been flagged anywhere in the network, every inbound agent gets instant protection. One detection anywhere protects every call center, every agent, every extension.
Callback Verification

Dial back. Confirm identity. Then connect.

When someone calls your bank claiming to be a customer, Whsipder doesn't trust the caller ID. It holds the call, dials the real number back, and asks the owner to confirm they're calling. Spoofed numbers can't survive a callback to the real owner.

Callback Verification Flow
Inbound call to bank call center
  Caller ID matches account holder "Jane Doe"
  |
  v
[Scoring Engine] ──> Suspicious
  |
  v
[Hold inbound call]
  |
  ├─ Dial Jane Doe's real phone
  │   └─ "Did you just call [Bank Name]?"
  │       ├─ YES ──> Resume + verify infrastructure match
  │       ├─ NO  ──> Reject + flag + alert security
  │       └─ No answer ──> Reject + hold for review
  |
  v
[If resumed] Infrastructure cross-check
  ├─ Match   ──> Connect to agent
  └─ Mismatch ──> Flag + monitor call
Why spoofing dies
An attacker spoofing a customer's number can't intercept a callback to the real customer. The real account holder either confirms the call or doesn't — there's no way to fake this. Caller ID spoofing becomes useless against callback verification.
Infrastructure cross-check
Even after callback confirmation, Whsipder compares the inbound call's infrastructure fingerprint against known patterns for that caller. A confirmed caller on mismatched infrastructure still gets flagged — catches compromised devices and SIM swaps.
Smart triggering
Callback doesn't fire on every call — only when scoring detects anomalies. Known-good callers with established reputation and matching fingerprints connect to agents instantly. Zero friction for legitimate customers.
Configurable per queue
Enable callback verification globally, per trunk, or per agent queue. Wire transfer desks get mandatory verification. General inquiries get standard scoring. VIP lines get custom thresholds. All configurable in real time.
Deepfake Shield

Cloned voices don't fool the GPU.

Attackers clone executive voices to authorize wire transfers over the phone. They clone customer voices to pass voice-based authentication. Whsipder runs real-time deepfake detection on every inbound call — catching synthetic speech, cloned audio, and AI-generated voices before damage is done.

Synthetic voice detection
Proprietary AI classifier trained to distinguish real human speech from synthetic audio. Detects text-to-speech engines, voice cloning, and concatenative synthesis in real time. An attacker playing a cloned CEO voice to authorize a wire gets caught instantly.
Voice biometric verification
Speaker embeddings compare the caller's voice against enrolled profiles. Someone calls claiming to be a customer but the voice doesn't match — instant flag. Stops impersonation even when the attacker has the right account number, SSN, and caller ID.
Acoustic environment analysis
Audio environment profiling distinguishes where calls originate from. A "customer calling from home" whose audio environment matches a VoIP datacenter or overseas call center gets flagged immediately. Catches fraud farms regardless of voice quality.
Mid-call termination
If deepfake detection triggers after the call connects, Whsipder terminates the call and alerts the agent's supervisor. Combined with live transcription, catches social engineering scripts mid-sentence — triggering instant intervention when fraud patterns are detected.
Enterprise & Call Center

Banks. Call centers. Internal helpdesks.

Sit in front of enterprise SIP trunks and filter vishing campaigns, customer impersonation, and social engineering calls before they reach any agent or employee.

Per-queue policies
Wire transfer desks get mandatory callback verification and deepfake screening. IT helpdesks get enhanced social engineering detection for OTP phishing. General inquiry lines get standard robocall blocking. Every queue, custom protection.
Campaign detection
When multiple agents receive similar social engineering calls — same script, same voice, different spoofed numbers — Whsipder correlates them into a campaign and blocks the entire pattern. One caught call protects every agent.
Compliance & audit trail
Full audit trail of every blocked call, every deepfake detection, every callback verification. Export to SIEM, generate compliance reports for regulators, and feed threat intelligence back into the network-wide reputation system.
Zero-trust voice
No inbound call is trusted by default — not even if the caller ID matches a known customer. Every call earns trust through scoring, verification, and voice analysis. The same zero-trust model that transformed network security, applied to voice.
Stop wire fraud. Stop OTP phishing. Stop voice deepfakes.

See Whsipder inbound protection in action — callback verification, deepfake detection, and social engineering blocking on live call traffic.

Request a Demo