公开(公告)号：US20200012783A1

公开(公告)日：2020-01-09

申请号：US16409205

申请日：2019-05-10

Applicant: Arm Limited

Inventor： Carl Wayne VINEYARD ,  Christopher Neal HINDS ,  Subbayya Chowdary YANAMADALA ,  Asaf SHEN

IPC: G06F21/55 ,  G06F21/56

Abstract: A computing device can include a comparator coupled to an I/O pin of the computing device; a storage unit coupled to the comparator; and a counter coupled to receive an output of the comparator, an output of the counter being coupled to a computation engine to provide a limit-exceeded signal to the computation engine, wherein the counter comprises a volatile counter and a nonvolatile storage, wherein the nonvolatile storage stores a bit for each top volatile count number of events identified by the volatile counter. The computing device can further include a backup power source coupled to the volatile counter; and readout circuitry and control logic coupled to the volatile counter and to the nonvolatile storage, the readout circuitry and control logic being configured to control operations of the volatile counter during an error event and determine a total number of events. The computing device can be a smart card.

公开(公告)号：US20190228164A1

公开(公告)日：2019-07-25

申请号：US16238057

申请日：2019-01-02

Applicant: Arm Limited ,  Altair Semiconductor Ltd

Inventor： Asaf SHEN ,  Patrick BIGET ,  Avishay SHARAGA ,  Omer BOTVINIK

IPC: G06F21/60 ,  H04L9/32 ,  H04L9/14 ,  H04L9/30 ,  H04L9/06 ,  G06F21/72

Abstract: A method for exporting sensitive information an integrated circuit, the method comprising: fabricating an integrated circuit, the integrated circuit having a register-transfer level “RTL” key fabricated in the integrated circuit, wherein the RTL key is a pre-determined cryptographic key; signing the sensitive information using the RTL key using a signature; and exporting the signed sensitive information and the signature for validation.