Zwave INDUSTRIAL STRENGTH increased security standards go into effect today.

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As of today, April 2, 2017, Z-Wave's technical certification program, which is administered through 3rd party test facilities in Europe, US and Asia, will check that all S2 security solutions, which contain rules for command classes, timers and device types are correctly implemented in every new certified device. S2 devices will also be backwards compatible with existing devices on the market.
The Z-Wave S2 framework was developed in conjunction with the cybersecurity expert community to give the already secure Z-Wave devices new levels of impenetrability. By securing communication both locally for home-based devices and in the hub or gateway for cloud functions, S2 also virtually removes the risk of devices being hacked while they are included in the network. By using a QR or pin-code on the device itself the devices are uniquely authenticated to the network as well. Common hacks such as man in the middle and brute force are virtually powerless against the S2 framework through the implementation of the industry-wide accepted secure key exchange using Elliptic Curve Diffie-Hellman (ECDH). Finally, Z-Wave also strengthened its cloud communication, enabling the tunnelling of all Z-Wave over IP (Z/IP) traffic through a secure TLS 1.1 tunnel, removing vulnerability.

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