Yes, it is.
The deskMate client has an own protocol using the FIPS-197 compliant AES-128 encryption for your desktop connection (for both - sending and receiving data). Each connection uses its own session key. The keys are negotiated within a TLS secured connection with 2048 bit RSA keys and SHA hashing algorithm. Additional to the standard TLS certificate checks (date, subject and issuer) tocario also verify the fingerprint.