Wearable devices are gaining traction, with estimates that more than 175 million will be in use by 2018. Today, one in five Americans own such a device, and one in 10 wears one daily (PwC). Most HR and IT departments have little concern for employees’ use of these devices. We don’t think of them as having a hard drive with sensitive data, or WiFi or cellular activity. In fact, no continuous connection to the Internet. You may want to think twice.