公开(公告)号：US20210399903A1

公开(公告)日：2021-12-23

申请号：US16909049

申请日：2020-06-23

Applicant: Arm Limited

Inventor： Mathias Sven Lucien Alain BROSSARD ,  Brendan James MORAN

IPC: H04L9/32 ,  H04L9/08 ,  G06F21/64 ,  G06F21/60 ,  H04L29/06 ,  H04L9/14

Abstract: Apparatuses, systems, methods, and software are disclosed for authorization delegation. In a participant device a derivative key is generated in dependence on a received key. An authenticity check value for a delegation information block is generated in dependence on the delegation information block and the received key. The derivative key is derived in dependence on the delegation information block and the received key. An extended certificate chain is created comprising a received certificate chain appended with a local certificate, which comprises the delegation information block and the authenticity check value.