Résumé
As any other circuits, secure devices need to be tested to ensure their reliability. Nevertheless, test infrastructures, such as JTAG or scan chains, can maliciously be used to steal secret data stored or processed in secure devices. In this paper, we explore a lightweight solution to protect JTAG access based on a challenge-response authentication protocol. A JTAGauthentication dedicated IP is presented. Design alternatives for quick IP plug-and-play, security, area and test time optimization are presented and evaluated.