Cable security

A device including a cable transceiver including cable electrical connections including data electrical connections and control electrical connections, and a hardware memory device, the hardware memory device storing a string identifying a cable and being electrically accessible from externally to the cable transceiver via the control electrical connections. The cable, in electrical connection with the cable electrical connections, may be included in the device. A device for verifying cable authenticity is also described, the device including interface hardware for interfacing a plurality of cables with the device, and verifier circuitry configured to verify that each of the plurality of cables is genuine based on a string stored in a hardware memory device included in each of the plurality of cables. Related apparatus and methods are also described.