Connecting the Photon to a untrusted network

[Moors7]

I could be mistaken, but that question sounds awfully familiar:

Security Of the Spark Cloud

What about the Spark Core, Photon, Electron themselves and not the Spark cloud? Even if the Spark cloud is secure is the devices themselves secure? Is the data sent to the Spark devices secure? Can I capture packets and read plain text information or is the data sent to the Spark devices or is the data encrypted and it it is what encryption is used?