公开(公告)号：US20230114775A1

公开(公告)日：2023-04-13

申请号：US17958859

申请日：2022-10-03

Applicant: Infineon Technologies AG

Inventor： Marcus Janke ,  Manfred Roth ,  Stephan Miculcy

IPC: G06F21/57 ,  G06F8/65 ,  H04L9/08 ,  H04L9/32

Abstract: A portable chip device comprises a chip having an operating system and a loader, the loader being configured to load a software module onto the chip and/or to render the software module in the chip executable, a communications interface configured to communicate with an external reader, the portable chip device being configured to carry out a software module update by: receiving a second key in the loader via communication between the external reader and the communications interface, where the communication is encrypted with a first key, and storing the second key in the loader, the operating system being configured to provide the decryption of the communication encrypted with the first key, authenticating the external reader using the symmetric key stored in the loader, receiving software module update data in the loader via the communications interface, and executing the software module update with the software module update data.