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
USERTrust RSA Certification Authority (root CA)
SHA1 Fingerprint – 2B:8F:1B:57:33:0D:BB:A2:D0:7A:6C:51:F7:0E:E9:0D:DA:B9:AD:8E
SHA256 Fingerprint – E7:93:C9:B0:2F:D8:AA:13:E2:1C:31:22:8A:CC:B0:81:19:64:3B:74:9C:89:89:64:B1:74:6D:46:C3:D4:CB:D2
radius.sin.cvut.cz – download in PEM format
SHA1 Fingerprint - 02:B0:6E:34:69:C3:F1:85:53:3A:EB:63:29:F6:69:F5:3B:71:F5:A6
SHA256 Fingerprint - 20:DE:B4:DA:69:AA:0E:45:19:5C:5D:5C:F3:1E:47:B9:97:BD:D5:23:F0:F0:66:C7:CB:1B:45:37:61:CE:9A:44
radius.sin.cvut.cz – download in PEM format
SHA1 Fingerprint - B2:17:59:F3:41:3D:32:B3:7E:B3:D4:D2:4C:03:5E:8E:D9:D5:FF:F0
SHA256 Fingerprint - 99:7A:FB:28:47:D4:5E:FD:29:7F:60:8B:42:8C:9F:9F:46:AF:0A:72:7B:9C:C0:DD:B3:9C:04:0F:39:99:83:96
Local certificate copies (when connecting from registration network)
To save these to your device, right-click/tap-and-hold on these links and select Save link as… / Save target as…
USERTrust RSA Certification Authority - download in DER format or PEM format
(one or the other will work)
Install certificates in OS Android
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.
USERTrust RSA Certification Authority - download in 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 “UserTrust CA” 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.