# MaskPrompt.ai
  
> Client-Safe AI Layer for Professionals

MaskPrompt is a local-first browser extension (Chrome, Edge, Brave) that automatically masks sensitive client data (PII, PHI) directly on the user's device before it reaches cloud AI models like ChatGPT or Gemini.

## How It Works (Mechanism)
- Seamless Integration: Operates natively inside the standard ChatGPT and Gemini interfaces. No clunky third-party dashboards.
- Local Redaction: Swaps sensitive entities with secure placeholder tags (e.g., "John Doe" becomes `<PERSON_AF8C/>`) locally.
- Reverse Decoding: When the AI responds, the extension decodes the tags back to the original text on the user's screen.
- Blind AI Principle: The LLM provider (OpenAI/Google) never receives the plaintext data, mathematically eliminating AI training risks.

## Core Architecture
- 100% Local Inference: Powered by highly optimized Small Language Models (SLM) running natively via JavaScript/ONNX high-performance masking directly in the browser's sandbox.
- Zero Data Retention: The mapping dictionary exists only in active tab RAM. An "Auto-Wipe" mechanism permanently destroys all data instantly when the tab is closed.
- Zero Server-Side Logging: No API calls to external security servers. Data never leaves the user's machine.

## Key Features
- Multi-Format Support: Parses and masks both plain text and Microsoft Word (.docx) files locally.
- Custom Dictionary & Whitelist: Users can define custom project names/trade secrets to mask, or whitelist public figures to ignore.
- Device-Bound Security: Licenses are cryptographically locked to specific hardware, protecting against stolen passwords.

## Compliance & Legal
- Legal: Fully compliant with ABA Rule 1.6 (Attorney-Client Privilege).
- Healthcare & Corporate: GDPR, CCPA, and HIPAA ready.
- BAA Bypass: Eliminates the complex need for Business Associate Agreements (BAAs) because the vendor never possesses the data in transit or at rest.

## Target Audience
Law firms, healthcare providers, and corporate enterprises seeking to leverage generative AI without risking confidentiality, malpractice lawsuits, or class-action liability.

## Pricing
- Launch Offer: $0/month for early adopters.
- Standard Pricing: $15/month per device (includes unlimited local masking and zero API token fees).

## Official Resources & Links
- Main Website: [https://maskprompt.ai/](https://maskprompt.ai/)
- Technical Whitepaper: [https://maskprompt.ai/privacy-promise](https://maskprompt.ai/privacy-promise)
- Engineering & Compliance Blog: [https://maskprompt.ai/blog](https://maskprompt.ai/blog)