A Zscaler report finds 91.5% of IoT communications within enterprises are in plaintext and so susceptible to interference. Credit: HYWARDS / Getty Images Of the millions of enterprise-IoT transactions examined in a recent study, the vast majority were sent without benefit of encryption, leaving the data vulnerable to theft and tampering. The research by cloud-based security provider Zscaler found that about 91.5 percent of transactions by internet of things devices took place over plaintext, while 8.5 percent were encrypted with SSL. That means if attackers could intercept the unencrypted traffic, they’d be able to read it and possibly alter it, then deliver it as if it had not been changed. Researchers looked through one month’s worth of enterprise traffic traversing Zscaler’s cloud seeking the digital footprints of IoT devices. It found and analyzed 56 million IoT-device transactions over that time, and identified the type of devices, protocols they used, the servers they communicated with, how often communication went in and out and general IoT traffic patterns. The team tried to find out which devices generate the most traffic and the threats they face. It discovered that 1,015 organizations had at least one IoT device. The most common devices were set-top boxes (52 percent), then smart TVs (17 percent), wearables (8 percent), data-collection terminals (8 percent), printers (7 percent), IP cameras and phones (5 percent) and medical devices (1 percent). While they represented only 8 percent of the devices, data-collection terminals generated 80 percent of the traffic. The breakdown is that 18 percent of the IoT devices use SSL to communicate all the time, and of the remaining 82 percent, half used it part of the time and half never used it. The study also found cases of plaintext HTTP being used to authenticate devices and to update software and firmware, as well as use of outdated crypto libraries and weak default credentials. While IoT devices are common in enterprises, “many of the devices are employee owned, and this is just one of the reasons they are a security concern,” the report says. Without strict policies and enforcement, these devices represent potential vulnerabilities. Another reason employee-owned IoT devices are a concern is that many businesses don’t consider them a threat because no data is stored on them. But if the data they gather is transmitted insecurely, it is at risk. 5 tips to protect enterprise IoT Zscaler recommends these security precautions: Change default credentials to something more secure. As employees bring in devices, encourage them to use strong passwords and to keep their firmware current. Isolate IoT devices on networks and restrict inbound and outbound network traffic. Restrict access to IoT devices from external networks and block unnecessary ports from external access. Apply regular security and firmware updates to IoT devices, and secure network traffic. Deploy tools to gain visibility of shadow-IoT devices already inside the network so they can be protected. Related content news Cisco steps up full-stack observability play with Splunk tie-ins Work has already begun to integrate Splunk, AppDynamics, and ThousandEyes as Cisco strengthens its observability lineup. By Michael Cooney Jun 07, 2024 5 mins Network Management Software Networking how-to Converting between uppercase and lowercase on the Linux command line Converting text between uppercase and lowercase can be very tedious, especially when you want to avoid inadvertent misspellings. Fortunately, Linux provides a handful of commands that can make the job very easy. By Sandra Henry Stocker Jun 07, 2024 5 mins Linux news Network jobs watch: Hiring, skills and certification trends What IT leaders need to know about expanding responsibilities, new titles and hot skills for network professionals and I&O teams. By Denise Dubie Jun 06, 2024 12 mins Careers Data Center Networking news Intel launches sixth-generation Xeon processor line With the new generation chips, Intel is putting an emphasis on energy efficiency. By Andy Patrizio Jun 06, 2024 3 mins CPUs and Processors Data Center PODCASTS VIDEOS RESOURCES EVENTS NEWSLETTERS Newsletter Promo Module Test Description for newsletter promo module. Please enter a valid email address Subscribe