ICT Crypto

ICT Crypto — electronic signature and document encryption directly on your device. The private key never leaves your phone.

Features:
• Document signing in PAdES (PDF), XAdES (XML), and CAdES/CMS formats.
• Keys in secure device storage (Android KeyStore / iOS Keychain) — key generation, import of .pfx/.p12 containers, and certificate selection from the system storage.
• Biometric verification (fingerprint / Face ID) before each signature.
• Device-to-device signing via QR code with end-to-end encryption (E2E): the key is transmitted directly in the QR code and remains on your devices; the relay server only sees the encrypted data.
• Data encryption and decryption (RSA / AES).
• Export of a public certificate (.cer / .pem) for sharing with verifiers.
• Launching from a website via a link: The website requests a signature, the app signs it locally and returns the result.

Confidentiality: private keys do not leave the device, documents are signed locally, and there is no advertising or tracking.

The same app is available for Windows and macOS, and on computers as the ICT Crypto browser extension.