Industry jargon

Signed firmware

Signed firmware is firmware accompanied by a cryptographic signature that lets a charger verify who authorised the software and whether it has been altered. The device checks that signature before accepting or installing the update. Digital signing helps prevent a corrupted or unauthorised firmware image from being treated as legitimate software. It is one part of a secure software-update process rather than a complete security system on its own. OCPP security guidance includes secure firmware-update mechanisms that use signing certificates to verify firmware integrity.