---
title: "See how Locke protects your data"
description: "See how the Locke Early Access desktop app detects sensitive data and masks it before it reaches the AI tools it covers — 100% on your device."
url: "https://sonomos.ai/product/"
source: "https://sonomos.ai/product/"
---

# See how Locke protects your data

Locke recognizes AI traffic on your device, including eligible services outside its built-in list. Supported requests are screened through the browser extension or a local proxy. Your prompts, files and detections stay on your machine. Your Sonomos account syncs settings, never content. Early Access for x64 Windows and Linux, with macOS coming soon.

## On your device

Detection and masking run on your machine.

## Off our servers

Your content never reaches Sonomos, so no one can get it through us.

## Nothing to breach

What we never hold can't be leaked, sold or subpoenaed.

The app, in Early Access

## Click through Locke before you install it.

The real interface with sample data, in Free and Teams views: dashboard, controls, reports, activity, sandbox and team management.

[Explore the Locke demo](https://sonomos.ai/locke/#demo)

## Four sensitive values in, four placeholders out

The AI gets one-way placeholders, never the real values. Locke 1.0 doesn't restore the originals. Reversible tokenization is planned shortly after 1.0.

Without Locke

Summarize the legal exposure for Margaret Chen (SSN 471-83-2914) in case CV-2024-00847. Her counsel at martinez.l@whitfield.law flagged potential HIPAA violations related to patient records shared with third-party vendors.

4 sensitive items exposed to the AI

With Locke

Summarize the legal exposure for {{NAME_1}} (SSN {{SSN_1}}) in case {{CASE_1}}. Her counsel at {{EMAIL_1}} flagged potential HIPAA violations related to patient records shared with third-party vendors.

0 sensitive items reach the AI. The request still makes sense.

## What runs on your device

Each part works on its own. Pick one to see it.

### Dashboard

Local-only metrics and exportable reports.

### Detection

Scans prompts and attachments as you send them.

Attachment scanning

### Masking

Swaps sensitive values for one-way placeholders. The AI keeps the context.

Early Access

### Interception layer

The layer between your AI tools and the internet: a browser extension for AI websites, a local proxy for command-line and API traffic.

Early Access

### Locke

The Sonomos desktop app. It reaches past the browser tab, to your terminal, scripts and SDK calls.

3

Total Unprotected

Prompts sent without full protection enabled

47

Data Detected

Sensitive items flagged by detection across sessions

12

Uploads Blocked

File attachments blocked before reaching AI servers

44

Data Removed

Sensitive items masked with one-way placeholders before submission

### Export a hashed PDF report

Timestamps, detection categories, risk levels, actions taken and session context, in an uneditable PDF built from data that never left your machine.

Hashed PDF

All metrics are computed locally. Nothing is transmitted, stored remotely, or shared with Sonomos.

## 36 detectors, 70+ categories

Checksum-validated regex plus semantic detection. A sample, by type and risk level.

HighMediumLow

High

Medium

Low

### Common Information(10)

### Financial & Banking(4)

### Cryptocurrency & Blockchain(12)

### Government IDs(6)

### Legal & Court(14)

### Medical & Healthcare(4)

### Security & API Keys(6)

### Technical & Network(5)

### Device Identifiers(4)

Early Access

## Locke also screens what never opens a browser tab

Command-line agents like Claude Code and gemini-cli, your own scripts and SDK calls, local model servers you point at it: all screened on your machine.

WindowsLinux

macOS support is planned.

[Download Locke](https://sonomos.ai/downloads/)[Explore the interactive demo](https://sonomos.ai/locke/#demo)

Background reading: [data masking](https://sonomos.ai/glossary/data-masking/), [tokenization](https://sonomos.ai/glossary/tokenization/) and [contextual matching](https://sonomos.ai/glossary/contextual-matching/). Or compare Locke to [other approaches](https://sonomos.ai/compare/).