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Download & Full Version

RotorCrypt X
download & buy

Try the shareware for free or unlock all 50 rotors with the full version — one-time payment, no subscriptions, no cloud.

Demo
▶ DEMO
Shareware
Windows & Android
Free
0 €
Free forever — no registration required
  • 3 rotors (like the original Enigma 1939)
  • AES-256-GCM + HKDF-SHA3-256
  • Handshake system
  • 10 languages
  • No cloud, no server
  • Windows 10/11 (64-bit) · ZIP file · unzip & run
  • Android 8.0+ · via Google Play
  • Messages with >3 rotors cannot be decrypted
Windows 10/11 Download Google Play
Windows
▶ DEMO
Recommended
Full Version
Windows
Full Version
4,50 €
One-time · Lifetime license · Windows 10/11
  • Up to 50 rotors — maximum security
  • 2768 possible key combinations
  • AES-256-GCM + HKDF-SHA3-256
  • Handshake system
  • 10 languages
  • All future updates included
  • License key via email
Buy now — €4,50 via PayPal
Android
▶ DEMO
Full Version
Android
Full Version
4,49 €
One-time · Lifetime license · Android 8.0+
  • Up to 50 rotors — maximum security
  • 2768 possible key combinations
  • AES-256-GCM + HKDF-SHA3-256
  • Handshake system
  • 10 languages
  • All future updates included
  • License key via email
Buy now — €4,49 via PayPal
HOW TO BUY

1. Click "Buy now" → PayPal page opens
2. Transfer €4,50 (Windows) or €4,49 (Android) — please include your email address and Windows or Android in the payment reference
3. You will receive your personal license key by email
4. Open app → Settings → Activate license → Enter key → done

The license key is valid for one device (Windows or Android). For device changes, a short email is sufficient. Full version and shareware use the same keyfile format — desktop and mobile are compatible.
Security

Why More Rotors?

The original Enigma machine worked with 3 rotors and was cracked. With RotorCrypt X and up to 50 rotors, the key space multiplies exponentially. The result: 2768 possible key combinations — combined with AES-256-GCM and HKDF-SHA3-256, practically unbreakable.

3
Shareware — free
Like the original Enigma. More secure than 1939 through AES layers — not enough for maximum protection.
…
Freely selectable
Each additional rotor multiplies the key space. You decide how much security you need.
50
Full version — €4,49
2768 possible key combinations. AES-256-GCM + HKDF-SHA3-256: quantum-resistant security.
Version History

Release History

March 2025 – present · Desktop (Windows) & Mobile (Android)

🖥 RotorCrypt X — Desktop (Windows)
VersionDateTypeChanges
v1.9.0.1Aug 2026SECClosed a security gap in the key exchange (man-in-the-middle protection). Fixed numerous app crashes caused by faulty popup focus logic.
v1.8.8Jun 2026SECPassword security increased: Argon2id raised to 256 MB — maximum password hardening. Login encryption improved. Rotor count logic optimized.
v1.8.7May 2026SECPassword hardening via Argon2id — brute-force practically impossible. Cryptographic key exchange via shared key per contact.
v1.8.5Apr 2026FIXKnown bugs from v1.8.0 have been fixed. Stabilization of the GUI layer, optimization of the keyfile parser. Now additionally password protected.
v1.8.0Mar 2026RELEASEFirst public release. All core functions stable. Key file format finalized and compatible with the mobile version.
v1.7.5.0Dec 2025IMPComplete documentation of all security mechanisms. Installer-free ZIP distribution finalized.
v1.7.0.0Nov 2025NEWRotor count increased to 50. Multilingual support (10 languages). Export control compliance verified and documented.
v1.6.2.0Oct 2025FIXLicense validation secured for corrupted key files. GUI display errors under Windows 11 24H2 fixed.
v1.6.0.0Sep 2025NEWRotor count increased to 25. Flipboard animations in GUI. License system (Shareware / Full version) integrated.
v1.5.4.0Aug 2025SECNIST SP 800-88 three-pass overwrite on key deletion. No plaintext remains in memory.
v1.5.0.0Aug 2025NEWContact management with AES-256-GCM encrypted contact names. Anti-debug protection for Windows implemented.
v1.4.3.0Jul 2025FIXUnicode display errors in RTL languages fixed. Emoji encoding in encrypted texts stabilized.
v1.4.0.0Jul 2025NEWFull Unicode support (65,536 characters, incl. CJK, Arabic, Cyrillic). Rotor count increased to 10.
v1.3.2.0Jun 2025IMPPerformance optimization of HKDF derivation. Encryption time for large messages reduced by 40%.
v1.3.0.0Jun 2025SECHKDF-SHA3-256 introduced as third security layer. Key derivation fully migrated to Keccak basis.
v1.2.5.0May 2025FIXGCM tag verification fixed for special characters. Memory leak in rotor engine closed.
v1.2.0.0May 2025SECAES-256-GCM integrated as second encryption layer. Authenticated encryption prevents tampering.
v1.1.3.0Apr 2025FIXRotor stepping error with long messages fixed. Keyfile parsing secured for corrupted files.
v1.1.0.0Apr 2025NEWKeyfile system introduced (binary format, 13,600 bytes). First handshake algorithm implemented.
v1.0.5.0Mar 2025IMPFirst graphical interface implemented. Rotor logic stabilized, character set extended to ASCII.
v1.0.0.0Mar 2025NEWFirst internal concept and basic architecture. Rotor engine with 3 rotors, first implementation of encryption logic.
📱 RotorCrypt X Mobile — Android
VersionDateTypeChanges
v1.8.1Jun 2026FIX/SECBiometric login repaired — reliable Keystore storage. Argon2id 256 MB. Device switching supported. Help texts in 10 languages refined.
v1.8.0 ▸May 2026RELEASECurrent public release. Full compatibility with Desktop v1.8.8 confirmed. Available on Google Play.
v1.7.5.0Mar 2026FIXPassword validation popup: all 7 conditions displayed correctly in green/white. Biometric toast on desktop deactivated.
v1.7.0.0Mar 2026IMPUI contrast optimized. MDCheckbox replaced by Canvas drawing. All Emoji icons replaced by Material Icons.
v1.6.3.0Feb 2026FIXNavigation bug fixed (contact settings leaked into global settings). Password change overlay correctly closed.
v1.6.0.0Jan 2026NEWShareware decrypt blocking for messages with more than 3 rotors. Copy button configurable with messenger name.
v1.5.0.0Dec 2025SECAll print() outputs removed (7,182 lines checked). Logging reduced to ERROR level. No plaintext in logs.
v1.4.2.0Nov 2025FIXLanguage switching without re-login stabilized. Duplicate license UI sections removed. Wrong language in license dialog fixed.
v1.4.0.0Nov 2025NEW10-language support. System language detection at startup. All UI texts stored multilingually in _UI dictionary.
v1.3.5.0Oct 2025IMPAvatar system completely reworked. Crop overlay improved, Canvas drawing optimized. Screenshot protection activated.
v1.3.0.0Sep 2025NEWLicense manager for mobile implemented. Separate _LIC_MASTER — desktop and mobile licenses not interchangeable.
v1.2.3.0Aug 2025FIXHMAC error in Desktop→Mobile decryption fixed. Rotor swipe direction corrected (upward = larger number).
v1.2.0.0Aug 2025NEWHandshake system fully ported. Slot-64 bootstrap key mechanism. Keyfile compatibility with desktop verified.
v1.1.4.0Jul 2025SECSecurityManager with PBKDF2-HMAC-SHA256 (100,000 iterations). AES-256-GCM for all stored data.
v1.1.0.0Jul 2025NEWFirst functional UI on Android. Contact management, avatar system, SHA3-256-hashed file names implemented.
v1.0.3.0Jun 2025FIXCritical bug in HKDF derivation fixed (wrong parameter call broke desktop compatibility). Null-byte padding replaced by random bytes.
v1.0.0.0Jun 2025NEWMobile project started. Compatibility with desktop keyfile format defined as primary goal.
Legend: NEWNew feature  FIXBugfix  SECSecurity  IMPImprovement  RELEASEPublic release