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Secret Space Encryptor (SSE)

File Encryption, Text Encryption (Messages, Notes, …), Secure Password Manager
New in version 3.2.0.5
Password Vault: Added the post-quantum algorithm ML-KEM (NIST FIPS 203) for secure password exchange;
File Encryptor: File steganography — you can now encrypt and hide files (not just text) inside JPEG images;
New steganographic algorithm J-UNIWARD;
New compatible web apps are available at: https://pteo.paranoiaworks.mobi

more: https://paranoiaworks.mobi/sse/ssechangelog.htm
File Encryptor: Securely encrypt your private and confidential files or entire folders.
🎥 ~ Basic file encryption video tutorial

Text Encryptor: Protect your messages, notes, cryptocurrency keys (seeds, mnemonics), and other sensitive text from unauthorized access. Use the internal database or simply copy and paste to/from your favorite apps. Set a password for each encryption/decryption session—you can use an unlimited number of passwords for different purposes (e.g., notes, emails, social networking, or communication with individuals A, B, C, etc.).
🎥 ~ Text encryption video tutorial

Password Vault: Securely store and manage all your passwords, PINs, and notes in one place, protected by a single master password. Includes import/export functionality (compressed, fully encrypted .pwv format or unencrypted, editable .xml format).

Encryption Algorithms: Strong encryption using multiple ciphers, including AES (Rijndael) 256-bit, RC6 256-bit, Serpent 256-bit, Blowfish 448-bit, Twofish 256-bit + Threefish 1024-bit, SHACAL-2 512-bit, and Paranoia C4 2048-bit (available in the S.S.E. Pro version).
Steganography: The File and Text Encryptor include a steganographic feature that hides text or files within JPG images using the J-UNIWARD or F5 algorithm, combined with your chosen cipher to produce a final steganogram (JPEG image).
Additional Tools: Password Generator, Clipboard Cleaner, Algorithm Benchmark, and more.
Cross-platform Support: Desktop versions (Windows, Linux, macOS) of File Encryptor and Text Encryptor are available at: https://paranoiaworks.mobi

iOS Support: Paranoia File Encryption and Paranoia Text Encryption are also available for iOS (iPhone/iPad/iPod).
Web Version: An online, client-side JavaScript version of the File and Text Encryptor (AES) is available at: https://pteo.paranoiaworks.mobi

Versions

Although APK downloads are available below to give you the choice, you should be aware that by installing that way you will not receive update notifications and it's a less secure way to download. We recommend that you install the F-Droid client and use that.

Download F-Droid
  • Version 3.2.0.5 (141) suggested Added on Apr 27, 2026

    arm64-v8a armeabi-v7a x86_64

    This version requires Android 5.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions

    Download APK 11 MiB PGP Signature | Build Log

  • New in version 3.1.4
    Added localization for Italian + updated help documentation;

    more: https://paranoiaworks.mobi/sse/ssechangelog.htm
  • Version 3.1.4 (132) - Added on May 29, 2025

    arm64-v8a armeabi-v7a x86_64

    This version requires Android 4.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions

    Download APK 10 MiB PGP Signature | Build Log

  • New in version 3.1.3
    Added localizations for French, Portuguese, Korean, Hindi, Vietnamese, and Bahasa Indonesia (thanks to AI);

    more: https://paranoiaworks.mobi/sse/ssechangelog.htm
  • Version 3.1.3 (131) - Added on May 06, 2025

    arm64-v8a armeabi-v7a x86_64

    This version requires Android 4.0 or newer.

    It is built and signed by the original developer, and guaranteed to correspond to this source tarball.

    Permissions

    Download APK 10 MiB PGP Signature | Build Log