COUNTERSIGNING UPDATES FOR MULTI-CHIP DEVICES

    公开(公告)号:US20180082065A1

    公开(公告)日:2018-03-22

    申请号:US15588547

    申请日:2017-05-05

    Applicant: Apple Inc.

    CPC classification number: G06F21/572 H04L9/3247 H04L63/0823 H04L63/123

    Abstract: A device facilitating countersigning updates for multi-chip devices includes at least one processor configured to receive, from a collocated chip, a data item and a software update, the data item being signed using a private key corresponding to a primary entity associated with the collocated chip and the data item comprising an authentication code generated using a symmetric key corresponding to a secondary entity associated with the software update. At least one processor is further configured to verify the data item using a public key associated with the primary entity. At least one processor is further configured to verify the software update based at least in part on the authentication code and using the symmetric key corresponding to the primary entity. At least one processor is further configured to install the software update when both the data item and the software update are verified, otherwise discard the software update.

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