Certificates - verifying our network identity

In case you need our RADIUS server certificate, or the Certificate Authority certificate, we offer download below.

Local copies are also available below.

CA certificates:
CESNET – Certificate chain of TCS server certificates

AAA Certificate Services (root CA)
SHA1 Fingerprint – D1:EB:23:A4:6D:17:D6:8F:D9:25:64:C2:F1:F1:60:17:64:D8:E3:49
SHA256 Fingerprint– D7:A7:A0:FB:5D:7E:27:31:D7:71:E9:48:4E:BC:DE:F7:1D:5F:0C:3E:0A:29:48:78:2B:C8:3E:E0:EA:69:9E:F4

radius.sin.cvut.cz – PEM
SHA1 Fingerprint – 84:F2:30:06:E1:66:CF:33:08:75:EA:DA:6D:19:02:3F:7F:5F:A3:36
SHA256 Fingerprint – 64:C3:65:37:DC:AC:63:23:B5:19:F7:0D:87:67:69:1D:93:C0:E1:4A:81:A7:15:7B:42:40:44:53:75:47:C8:7D

To save these to your device, right-click/tap-and-hold on these links and select Save link as… / Save target as…

AAA Certificate Services - PEM format

First, download these certificates into your Android device. We recommend using Chrome or integrated browser to perform the download, or download them using your laptop/computer and transfer to your Android using a USB cable or an SD card.

AAA Certificate Services - PEM format

The following instructions differ from device to device, but they all follow the same theme:

In your Android device:

• Go to Settings → Wi-Fi.
• Go to Advanced Wi-Fi. This can be hidden in a context menu.
• Choose Install a certificate.
  • A file browser should open. Find your downloaded certificate file (usually in “Downloads” directory) and tap the file. (You only need to install one of the PEM/DER. If one fails, try the other one.)
  • Follow the instructions on your device. Choose a name for the certificate, like “DigiCert” or “Sincoolka”.
  • Choose Wi-Fi as a certificate type, if possible.
  • Confirm the installation.
• Then, during setting up Wi-Fi, select this new certificate as a CA certificate.