Dynatrace Managed cluster and Mission Control communicate over HTTPS, specifically with TLS 1.2. The certificate (SHA-2) has a 2048 bit RSA key used for the key exchange.
The accepted encryption standard for encrypting the data traffic is AES256.
You can always check up-to-date information by verifying SSL of Mission Control main domain: mcsvc.dynatrace.com.
Encryption key: RSA 2048 bits (SHA256withRSA)
The only supported protocol is: TLS 1.2
and many many more detailed information if you are interested.