公开(公告)号：US20200174694A1

公开(公告)日：2020-06-04

申请号：US16206066

申请日：2018-11-30

Applicant: NXP B.V.

Inventor： Marcel MEDWED ,  Jan HOOGERBRUGGE ,  Ventzislav NIKOV

IPC: G06F3/06 ,  G06F13/24

Abstract: A computing system using low-fat pointers, including: a memory configured to be accessed by the low-fat pointers; a processing core configured to access the memory; an interrupt controller configured to receive interrupts and to communicate interrupts to processes running on the processing core; and a memory safety peripheral configured to receive a pointer request, wherein the pointer is a low-fat pointer and to verify that the pointer request is within required memory bounds

公开(公告)号：US20200380140A1

公开(公告)日：2020-12-03

申请号：US16427977

申请日：2019-05-31

Applicant: NXP B.V.

Inventor： Marcel MEDWED ,  Jan HOOGERBRUGGE ,  Ventzislav NIKOV ,  Asier GOIKOETXEA YANCI

IPC: G06F21/60 ,  G06F21/62 ,  G06F17/18

Abstract: A chip for securing storage of information includes a manager to access a pointer and a cipher engine to decrypt stored data. The pointer includes a first area and a second area. The first area includes an address indicating a storage location of the data and the second area includes a safety tag. The cipher engine decrypts the data output from the storage location based on a key and the safety tag in the second area of the pointer. These and other operations may be performed based on metadata that indicate probabilities that a correct safety tag was used to decrypt the data. in another embodiment, the manager may be replaced with an L1 cache.

公开(公告)号：US20190132116A1

公开(公告)日：2019-05-02

申请号：US15795890

申请日：2017-10-27

Applicant: NXP B.V.

Inventor： Wilhelmus Petrus Adrianus Johannus MICHIELS ,  Marcel MEDWED ,  Jan HOOGERBRUGGE ,  Ventzislav NIKOV ,  Bruce MURRAY ,  Joppe Willem BOS

IPC: H04L9/06 ,  H04L9/14

Abstract: A method for implementing a pseudo-random function (PRF) using a white-box implementation of a cryptographic function in N rounds, including: receiving an input to the PRF; receiving a cryptographic key in a first round; encrypting, using the white-box implementation of the cryptographic function and the cryptographic key, an input message that is one of M possible input messages based upon a portion of the input to produce a first output; for each succeeding round: encrypting, using the white-box implementation of the cryptographic function and an ith cryptographic key, further input messages that are one of M possible input messages based upon a further portion of the input to produce an ith output, wherein the ith cryptographic key is the output from the preceding round, wherein the white-box implementation of the cryptographic function only produces a correct output for the M possible input messages and produces an incorrect output for input messages that are not one of the M possible input messages.