Hi Shivam --
If the team is saying that the transport is where the encryption layer is implemented, you need to ask for the certificates, and most of our transports can use these if you apply them in your local.properties file. You want JKS or PKCS12 certificates, probably both server- and client-side.
If the team is saying that the data is where the encryption layer is implemented, you need to ask them how it's done, and use the same techniques to create a data protocol handler to decrypt incoming messages and encrypt outgoing messages. In a couple of engagements, I've even copied custom encryption code from a developer IDE and pasted it into a scriptable DPH to replicate the actions of the real service.
Rick