For communication encryption, the app uses technologies based on the public key infrastructure and symmetric cryptography.

  • Communication through: 3G/4G and WiFi.
  • The application uses X509v3 digital certificates.
  • The digital certificate and its corresponding cryptographic keys are stored on the smartcard or are protected on the smartcard or on the smartphone.
  • The session keys are generated for each message and voice call.
  • The messages are stored permanently in the phone in encrypted format. They can be stored indefinitely or deleted immediately.
  • TLS-type secured connection.
  • The status of the digital certificate and of the integrity of messages based on the electronic signature and digital certificate is validated continuously.
  • No information about the content of the communication is stored nor is it accessible to someone other than the user.
  • certSIGN does not store any information about the communications initiated through Trust4Mobile: conversations, text messages, call history or the serials of the digital certificates.
  • The infrastructure required to implement the system can be made entirely available to you. Thus, you get a complete solution. Or you can use certSIGN’s infrastructure and use the application as a service.