Free Download
Letro Application
You can download the application via below links, please contact us, if you face any problem.


Why It Matters
Privacy Guaranteed
E2EE ensures that your sensitive information—ranging from personal data to institutional records—remains confidential.
Data Integrity and Tamper-Resistance
The encryption process scrambles content in such a way that any tampering with the encrypted message makes it unreadable when decrypted.
This feature makes tampering easy to detect, strengthening the security and integrity of communications. When unauthorized changes occur, they become immediately apparent, reinforcing trust in the reliability of digital communications.
Improved compliance management
Many data protection laws, including GDPR, mandate data encryption of user-identifiable data as part of their privacy requirements. By implementing E2EE, organizations can maintain compliance with these regulations while strengthening data security and supporting privacy-first design principles.
Enhanced Trust
E2EE ensures that your sensitive information—ranging from personal data to institutional records—remains confidential.
Minimal Attack Surface
E2EE ensures that your sensitive information—ranging from personal data to institutional records—remains confidential.
How It Works
Encryption

Letro encrypts every message or file at the sender’s device before it even leaves the application.
Transmission

Ciphertext, or encrypted data, is transmitted securely over communication channels like the internet or other networks.
Decryption

Letro Decrypts every message or file at the recipient’s device before.
Authentication

Decrypted data is verified to ensure its integrity and authenticity. This step might involve verifying the sender’s digital signature to confirm that no one tampered with the data during transmission.