CertDigitalKSP

CENTRUL DE CALCUL SA

About this app

CertDigital KSP is the official app for qualified electronic signing of PDF documents using CertDigital cloud digital certificates.

KEY FEATURES

• Qualified Electronic Signature (QES) compliant with eIDAS regulation and PAdES standard
• Secure authentication via Keycloak (OAuth 2.0 + PKCE)
• Cloud digital certificate selection from CertDigital KSP
• Full PDF document preview with page navigation
• Visual signature stamp placement on any page
• Two-step signing: password + OTP code for maximum security
• Round visual stamp with signer name, date, and CertDigital logo
• Quick sharing of signed documents
• Biometric authentication support (fingerprint/face) for fast signing
• Romanian and English interface
• Recently signed documents history

HOW IT WORKS

1. Sign in with your CertDigital account
2. Select a PDF document from your phone
3. Choose your signing digital certificate
4. Place the visual stamp on the document
5. Enter your password and the OTP code received
6. The signed document is ready to share

SECURITY

The app never stores your private key on the device. Signing is performed on CertDigital's secure HSM server. Communication is end-to-end encrypted. Authentication tokens are securely stored using Android Keystore.

REQUIREMENTS

• CertDigital account with an active KSP qualified digital certificate
• Android 8.0 or later
• Internet connection

Developed by CENTRUL DE CALCUL SA.

What’s new

• Compatibility with Android 16.
• Stability improvements and internal optimizations.