Chiffr

Secure Messaging

Only for iPhone

Free · In‑App Purchases · Designed for iPhone

iPhone

Quantum-resistant chat encryption using device-to-device Bluetooth key exchange. No servers, no backdoors. Stream ciphers protect your chats now and in the future. Take control of your private conversations with encryption designed for the quantum age. Unlike traditional messaging apps that rely on internet-based Diffie–Hellman key exchange, we leverage a direct Bluetooth connection between devices to share encryption keys. Our most secure encryption, derived from photo entropy, uses a bit-by-bit unique stream cipher to ensure your data is unintelligible to any quantum computer, government or corporation now and in the future. Your conversations stay truly private with the option to permanently erase chat history with a single tap. If you delete the cipher, your data becomes forever undecodable, however advanced future quantum computers may be. This puts the power of your information back into your hands. This app caters to privacy-conscious individuals who value true confidentiality in today's digital world. Why Choose Our Solution? Device-to-device key exchange - no servers, no backdoors Choose between AES or Stream Ciphers to protect your messages Permanently erase entire chat histories with one tap Zero metadata collected Audit our encryption online Perfect For: Privacy-conscious professionals Individuals seeking genuine auditable digital privacy Anyone concerned about future quantum computing threats Parents seeking digital security In a world of increasing surveillance and data collection, we put true privacy back in your hands. Experience communication as it should be: secure, private, and completely under your control. Because privacy isn't just a feature – it's your right

Ratings & Reviews

  • This app hasn’t received enough ratings or reviews to display an overview.

The developer, Rachel Miller, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Contact Info
    • Identifiers
    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

  • Seller
    • Rachel Miller
  • Size
    • 19.7 MB
  • Category
    • Social Networking
  • Compatibility
    Requires iOS 17.6 or later.
    • iPhone
      Requires iOS 17.6 or later.
    • Mac
      Requires macOS 14.6 or later and a Mac with Apple M1 chip or later.
  • Languages
    • English
  • Age Rating
    4+
  • In-App Purchases
    Yes
  • Copyright
    • © 2025 Rachel Miller
  • Privacy Policy

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