Security researcher Xusheng Li found that a Lenovo ThinkPlus FU100 fingerprint USB stick, sold as an AES-256-encrypted device for data security, ended up being just a plain SD card internally, HackingPassion reports. The fingerprint reader only enabled the USB connection, and nothing on the card was actually encrypted. An AI-assisted follow-up last week discovered what Li calls backdoor accounts on another maker’s drive, as well as hardcoded keys in other supposedly secure USB storage products.