Open Source Encryption Tool
Verify Your Messages
We believe in transparency and security. That's why we've made our encryption system open source and available for everyone to inspect and use.
What Can You Do With It?
-
Pre-encrypt Messages
- Encrypt your messages before adding them to the Last Message app
- Have complete control over the encryption process
- See exactly how your data is secured
-
Decrypt Received Messages
- No need to install the app just for reading a received message
- Uses the same secure decryption as the app
- Works directly in your browser
Security First
Our encryption tool uses:
- AES-GCM encryption with 256-bit keys
- PBKDF2 key derivation with 480,000 iterations
- Client-side encryption (everything happens in your browser)
- No data storage or server communication
Easy to Use
- Go to https://lastmessagenet.github.io/encryption/
- Choose your language (English or Polish)
- Select encrypt or decrypt
- That's it!
Full Transparency
- The complete source code is https://github.com/lastmessagenet/encryption
- No registration required
- Works offline after page load
- Compatible with all modern browsers
Try It Now
https://lastmessagenet.github.io/encryption/
Technical Notes
- Compatible with Chrome 49+, Firefox 43+, Safari 11+, and Edge 12+
- Uses the Web Crypto API for secure cryptographic operations
- Open-source under MIT license