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Datagram Transport Layer Security (DTLS) is a communications protocol that provides security for datagram-based applications by allowing them to communicate in a way that is designed to prevent eavesdropping, tampering, or message forgery. The DTLS protocol is based on the stream-oriented Transport Layer Security (TLS) protocol and is intended to provide similar security guarantees.

The new version features DTLS encryption and identity authentication. This feature can be used in conjunction with static key AES scrambling for end-to-end encryption. The DTLS encryption replaces the “Automatic Encryption” option, which was available in previous versions.

DTLS encryption can be configured on any Input or Output UDP port on the Zixi Broadcaster. This feature is activated and configured in the Settings screen. A DTLS server is configured using certificate and private key files in X.509 PEM format, similar to the files used to enable an HTTPS server.

To enable DTLS encryption:

1. Go to Settings > General.
2. Under the General section, select the Enable DTLS checkbox.
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3. In the Certificate uploaded field, click Upload.
4. Browse to find your certificate file, select it and click Open.
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5. In the Private key uploaded field, click Upload.
6. Browse to find your private key file, select it and click Open.
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7. In the Private key passphrase field, type a passphrase, if one exists.
8. Verify that there is a green Yes next to both Upload buttons.
9. Click Apply.