# StealthOp: Secure PGP Messages — Hidden messages & images

> Hide encrypted messages and images within plain text using zero-width characters. (iPhone/iPad app by Grey LLC.)

- Source: https://appshunter.io/ios/app/stealthop-secure-pgp-messages/id6740215870 (this page in markdown: same URL + `.md`)
- Developer: [Grey LLC](https://appshunter.io/developer/1597606243)
- Category: Developer Tools
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2025-06-03
- Data updated: 2026-08-21
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/stealthop-secure-pgp-messages/id6740215870/reviews.md

## What is StealthOp?

StealthOps - Invisible Secure Messaging

StealthOps is an advanced steganography app that allows you to hide encrypted messages and images inside normal-looking text using cutting-edge zero-width character technology. Your secret communications remain completely invisible to anyone without the proper decryption keys.

What It Does

StealthOps transforms ordinary text like "Hey, how's your day going? Hope you're doing well!" into the exact same looking text that secretly contains hidden encrypted content. The text appears identical, but contains a hidden encrypted message or image that only the intended recipient can reveal.

How It Works

Zero-Width Steganography: Uses invisible Unicode characters (zero-width spaces, joiners, etc.) to embed data. The hidden content is completely invisible to the human eye and text appears normal in any messaging app, email, or social media. Can be copied, pasted, and shared like regular text.

Military-Grade Encryption: RSA 2048-bit encryption protects all hidden content. Public/Private key pairs ensure only intended recipients can decrypt. Each contact has unique encryption keys for maximum security. Messages are encrypted before being hidden in the text.

Dual Contact System: Sender Contacts are people who can send you encrypted messages. Receiver Contacts are people you can send encrypted messages to. Easy QR code sharing for exchanging public keys with automatic key management and validation.

Key Features

Hidden Text Messages: Encrypt secret text inside innocent-looking messages. Perfect for sensitive communications that need to appear normal. Supports any length of hidden content.

Hidden Image Encryption: Hide entire images inside plain text messages. Images are compressed, encrypted, and embedded invisibly. Share photos securely without anyone knowing.

Contact Management: Add contacts by scanning QR codes or importing public keys. Visual indicators show contact types with secure key exchange process.

Smart Detection: Automatically detects if received text contains hidden content. Identifies whether hidden content is text or images with one-tap decryption and viewing.

Modern Interface: Clean, intuitive design with dark mode support. Segmented tabs for sent/received content. Real-time encryption status indicators and haptic feedback.

Security Features

End-to-End Encryption ensures messages are encrypted on your device before hiding. Zero Knowledge means the app never stores or transmits your private keys. Plausible Deniability makes hidden messages completely undetectable. Forward Secrecy uses unique key pairs for each contact. Tamper Detection safely rejects invalid or corrupted hidden content.

How to Use

Setup: Add contacts by scanning QR codes or importing public keys. Share your key by generating and sharing your public key via QR code. Verify keys to confirm key exchange with your contacts.

Sending: Select a receiver contact, enter your secret message or select an image, add innocent-looking cover text, then encrypt and share the normal-looking text anywhere.

Receiving: Paste suspicious text into the decode screen, select the sender contact for decryption, tap decode to reveal hidden content, then view the secret message or image.

Privacy & Security

No Cloud Storage keeps all data on your device. No Analytics means zero telemetry or user tracking. Offline Capable works without internet connectivity. Secure Deletion properly cleans up sensitive data.

StealthOps represents the cutting edge of digital steganography, combining advanced Unicode manipulation techniques, robust cryptographic implementations, user-friendly interface design, and cross-platform text compatibility. The app makes military-grade steganography accessible to everyone while maintaining the highest security standards.

StealthOps: Where your secrets become invisible.

## Key features

- Hide encrypted text messages
- Embed encrypted images in text
- Zero-width character steganography
- RSA 2048-bit encryption
- Dual contact system with QR key exchange
- Automatic detection of hidden content
- End-to-end encryption


## Frequently asked questions about StealthOp

### What is StealthOp?

StealthOp is an advanced steganography app that allows you to hide encrypted messages and images inside normal-looking text using zero-width character technology. It ensures your secret communications remain completely invisible to anyone without the proper decryption keys.

### How does StealthOp hide messages?

StealthOp uses invisible Unicode characters, such as zero-width spaces and joiners, to embed data. This hidden content is completely invisible to the human eye, and the text appears normal in any messaging app, email, or social media platform.

### What kind of encryption does StealthOp use?

StealthOp employs military-grade RSA 2048-bit encryption to protect all hidden content. Public/Private key pairs ensure that only intended recipients can decrypt messages, with each contact having unique encryption keys for maximum security.

### Can StealthOp hide images as well as text?

Yes, StealthOp allows you to hide entire images inside plain text messages. Images are compressed, encrypted, and embedded invisibly, enabling secure photo sharing without detection.

### How are contacts managed in StealthOp?

StealthOp features a dual contact system. You can add contacts by scanning QR codes or importing public keys. The app provides easy QR code sharing for exchanging public keys with automatic key management and validation.

### Does StealthOp have ads?

No, StealthOp does not contain advertisements. It is a completely free application with no ads to disrupt the user experience.

### What devices is StealthOp compatible with?

StealthOp is available for iPhone and iPad devices. It is designed to offer a seamless experience across Apple's mobile platforms.

### How often is StealthOp updated?

StealthOp was last updated on June 3, 2025, with version 1.0. This indicates a recent release, and users can expect future updates to enhance functionality and security.

## Version history (last 1 release)

### 1.0 — 2025-06-03

No release notes.

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All apps by Grey LLC: https://appshunter.io/developer/1597606243

## Related topics

[stegosafe](https://appshunter.io/ios/topics/stegosafe) · [pocket steganography](https://appshunter.io/ios/topics/pocket-steganography)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-21.*