Zero-Trust Enforcement for High-Risk Email
If they don't have
the phone,
the attack fails.
IntegrityLayer stops high-risk email actions — wire transfers, payroll changes, credential requests, sensitive data access, and script execution — by requiring the sender to tap their registered device before the message is delivered.
No MX changes. No DNS changes. No plugins. · 5 design partner slots — 2 remaining.
From: cfo@acme-corp.com
This is what a modern BEC attack
looks like in your client's mailbox.
Not a typo-filled spam email. A patient, multi-turn, objection-handling agent that has read weeks of internal correspondence.
AI phishing efficacy vs. elite human red teams:
"The AI agent doesn't make spelling mistakes. It doesn't send at 3 AM. It waits until Wednesday, uses your CFO's exact vocabulary, and offers a reasonable excuse for every objection. Your filter has nothing to detect."
Hoxhunt 2025 Phishing Research — AI vs. Human Red Team Efficacy
Microsoft Defender. Abnormal Security.
Mimecast. Proofpoint.
They were built to detect anomalies.
An AI agent produces zero anomalies.
Every probabilistic email security tool shares the same architectural assumption: attackers are humans who make mistakes. They analyze language patterns, sender history, and behavioral baselines.
When an AI agent has spent 48 hours reading the CFO's email history, it doesn't have anomalous language. When it uses a stolen OAuth session token, it has a valid authenticated session. SPF passes. DKIM passes. DMARC passes. The behavioral baseline matches.
The filter scores it 0.03. It delivers.
"The session is valid. The auth passed. The behavior matches the baseline. Every probabilistic system in the stack says: clean."
That is not a detection problem. It is an architecture problem.
You can out-analyze the text.
You cannot out-analyze the phone.
The logical conclusion of AI-powered phishing is simple: any text-based security system that relies on analyzing message content will eventually be defeated by AI that generates perfect content.
The only defense that is permanently immune to this attack is one that demands something the AI agent cannot produce:
Proof that a physical human is holding their phone
at the exact moment of the transaction.
IntegrityLayer is not a filter. It is a physical gate. When it catches a high-risk intent signal, the email does not move until the sender's registered device confirms it.
That is what "deterministic" means: the outcome is certain, not probabilistic.
How IntegrityLayer Works
API-driven intercept at the account level. No MX changes. No DNS changes. No browser extensions. Active the moment you grant API consent.
Exchange Transport Rule / Google Workspace Admin routing rule holds outbound email in system quarantine.
No plugins.
No MX changes.
No DNS changes.
SLM scores semantic intent in <300ms. ROUTINE: email released. HIGH RISK: escalates to Semantic Intent Engine.
Zero data retained.
US-hosted infrastructure.
Push notification sent to sender's registered device immediately.
Same routing layer. External inbound email to VIP mailbox held before delivery.
No client-side change required. No plugin.
Semantic Engine detects (a) sensitive-action request + (b) identity claim ("I am [VIP]").
If pattern matches: QUARANTINE triggered.
Auto-reply challenge sent to sender's address.
"Open your IntegrityLayer app and input code [XXXX]"
Hacker stares at a blank screen. Attack dies silently. Recipient never sees it.
Six attack vectors.
One gate.
IntegrityLayer covers the full lifecycle of a Business Email Compromise attack — whether the attacker is impersonating your CEO from a burner Gmail, or operating from a compromised internal account they've had for three weeks.
AI agent emails CFO from burner Gmail posing as CEO. "Boarding flight to London. Process $150k wire immediately. — John"
IDENTITY_CLAIM + WIRE_TRANSFER triggers quarantine. CFO never sees the email. Auto-challenge sent to the attacker's Gmail. Attack dies silently.
Attacker scrapes company directory, emails IT Helpdesk from Yahoo impersonating VP of Engineering. "Locked out of Okta — dropped my phone in a lake."
CREDENTIAL_REQUEST + IDENTITY_CLAIM triggers quarantine. IT Helpdesk never exposed to the social engineering attempt. Zero L1 tickets generated.
AI sleeper agent compromises junior dev's M365 account. Emails DB Admin: "Hey, can you Slack me the AWS production API keys for this new project?"
CREDENTIAL_REQUEST from internal account triggers push to dev's physical phone. Agent cannot tap the screen. Lateral movement hits a brick wall.
Hacked vendor emails Finance with "updated wiring instructions." Finance employee is fooled and replies with signed authorization form.
WIRE_TRANSFER authorization triggers push to Finance employee. Forced to pause and consciously verify before the email releases. Audit trail created.
Compromised account emails HR: "Please update my direct deposit to this new Chime account." Agent has full access to the authenticated session.
PAYROLL_CHANGE triggers push to the real employee's phone — who is at lunch. Employee sees the alert, realizes their session is compromised. Hits Deny.
Compromised internal account emails sysadmin with attached PowerShell script. "Run this to update VPN configs for the new remote team."
SCRIPT_EXECUTION request triggers push to sender's phone. Attacker cannot verify. Ransomware deployment via trusted employee channels blocked.
Passive Detection vs.
Active Physical Gate
Every existing solution alerts after the fact. IntegrityLayer stops the transaction before it happens.
Comparison based on published capabilities as of 2025. MS Defender = Office 365 Plan 2.
Stop eating liability.
Start billing for certainty.
Every BEC incident that hits your client list becomes a conversation about why your security stack didn't stop it. IntegrityLayer is the answer to that conversation.
The architecture is built for the channel. One Admin Consent URL per client. No per-device configuration. No MX record migration. No per-user onboarding training. Roll out to 20–50 VIP seats and you're done.
Not 5,000 seats. 20–50.
C-Suite. Finance. HR.
The 50 accounts with blast radius.
The sender gets a push notification when they do something high-risk. That's the entire user experience.
Pricing details on the briefing call. No pricing published at this stage.
5 design partner slots.
2 remaining.
Two 15-minute calls. Lifetime preferred pricing.
15 minutes. No commitment.
We'll walk through the full architecture and answer any technical questions about the deployment workflow.
Book a Technical Briefing →Financial & Legal MSPs prioritized.
If you prefer email first:
→ partners@integritylayersecurity.com