New Toy Alert: A Quick Review of Keysy

This is a concise hands-on review of the Keysy RFID device that demonstrates it can read and clone low-frequency (125 kHz) HID Prox cards when held within about an inch and takes roughly 17–20 seconds to capture; cloning to a rewritable fob worked and replay requires angling the device for a reader’s sweet spot. The author notes limitations (incompatibility with HF/UHF cards like iCLASS, close proximity requirement, and antenna geometry) and recommends that defenders educate personnel and adopt policies to mitigate risks posed by easy cloning devices.