After reading about BadUSB, Barbara asked if it was safe to share files through a flash drive. “Would we be safer using a cloud service?”
A cloud service might be safer than a flash drive, although that has its own dangers—especially with privacy. BadUSB shows us that malware can infect and reside in a flash drive’s firmware, which your antivirus program can’t scan the way it can scan the drive’s main storage. It’s like having the malware in your motherboard’s BIOS—except that this motherboard will likely get plugged into multiple computers.