USB condom
n. A modified USB adapter that prevents data from being stolen or malware from being installed when a mobile device's USB cable is plugged into a public charging station.
USB ports are ubiquitous on our electronic devices as a way to charge them and transfer data. But they’re also an easy entry point for malware or other nasty viruses. Enter the USB condom. These prophylactics for your digital devices are plugged to the end of a USB cable, and allow electricity to flow through while preventing data from being transferred or accessed.
It will be a pivotal part of a display, called Ways to be Secret, of hi-tech devices that raise questions about our privacy. It will include a selfie stick, a USB condom, a Fitbit Surge and a Cyborg Unplug, described as an "anti-wireless surveillance system for the home and workplace".
—Mark Brown, “Guardian's destroyed Snowden laptop to feature in major V&A show,” The Guardian (London), February 27, 2015
The USB condom is a small chip with male and female ports which connects between your device and the unknown USB port, linking-up the power cables but severing any potential data connection.
—Matthew Sparkes, “'Digital condom' protects against USB infections,” The Telegraph (London), August 26, 2014
2009 (earliest)
I’m not just about pointing out potential problems, I’m also about solutions. One could conceivably have a USB condom. This would be a USB coupler that will allow power to pass through and potentially could have enough smarts to probe the device plugged into it so that the device thinks it’s plugged into a computer.
—Jason Mansfield, “Rogue Phone Charging Station,” Clinically Awesome, October 02, 2009
As soon as the Condom USB detects a virus, built-in software shuts off USB access, verifies the problem, removes the nasty bug, then reopens the communication bridge to your computer.
—Long Tran, “Condom Protects You From Viruses!,” Yanko Design, January 07, 2009