privylayer 0.1.0

Privacy layer for AI prompts

🔐 PrivyLayer

Privacy layer for AI systems — protect sensitive data before it reaches AI.

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🚀 Overview

PrivyLayer is a lightweight Python library that acts as a security layer between user input and AI models.

It detects sensitive information (PII), replaces it with secure placeholders, and restores it after the AI response — ensuring zero data exposure.

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⚡ Why PrivyLayer?

Modern AI systems process user input directly, which may include:

• 📱 Phone numbers
• 📧 Emails
• 🪪 Aadhaar / PAN
• 🏦 Bank details

This creates a privacy risk.

👉 PrivyLayer solves this by introducing a reversible masking system.

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🧠 How It Works

User Input
   ↓
PrivyLayer (detect + mask)
   ↓
AI Model
   ↓
PrivyLayer (restore)
   ↓
Final Output

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✨ Features

• 🔍 Detects sensitive data using regex patterns
• 🔁 Reversible masking (no data loss)
• 🧠 Smart tokenization system
• ⚡ Fast and lightweight
• 🇮🇳 India-specific PII support
• 🔒 No data stored globally

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📦 Installation

pip install privylayer

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🛠️ Usage

🔐 Protect (Mask data)

from privylayer import protect

text = "My phone is 9876543210 and email is [e-mail]"

mask , context , seen = main.find_p(text)

print(mask)

Output:

My phone is ⟦PII_PHONE_x1⟧ and email is ⟦PII_EMAIL_x2⟧

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🔓 Restore (Unmask data)

from privylayer import restore

original = restore(masked, context)

print(original)

Output:

My phone is 9876543210 and email is [e-mail]

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🧩 Supported Data Types

• 📱 Phone numbers (India)
• 📧 Email addresses
• 🪪 Aadhaar numbers
• 🧾 PAN numbers
• 🏦 IFSC codes

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🔐 Token Format

PrivyLayer replaces sensitive data with structured tokens:

⟦PII_TYPE_ID⟧

Example:

⟦PII_PHONE_x1⟧
⟦PII_EMAIL_x2⟧

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⚠️ Limitations

• Regex-based detection (may not detect names accurately)
• Does not validate Aadhaar checksum (yet)
• Context must be preserved for restoration

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🚀 Roadmap

• AI-based name detection
• Risk scoring system
• Browser extension
• API gateway version
• Encryption-based token vault

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🤝 Contributing

Contributions are welcome!

• Fork the repo
• Create a feature branch
• Submit a pull request

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📄 License

MIT License

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👨‍💻 Author

Built by Nithish 🚀

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🌟 Vision

Making AI safe for everyone by protecting sensitive data at the source.

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