I think there's at least one or two, but I don't remember which ones. Maybe if you search "crypt" in the source code you can find it.
A good suggestion, I downloaded the sourcecode and did a search for "crypt"
One protocol came up: At2000ProtocolDecoder.java
I will check that out and the devices which are used with that protocol.
Hello is there any protocol to help decrypt blowfish algorithm?
Is there any supported communication protocol in traccar server protocols that uses encryption for communication between server and an tracker ?