公开(公告)号：US10372886B2

公开(公告)日：2019-08-06

申请号：US14815540

申请日：2015-07-31

Applicant: NXP B.V.

Inventor： Jan Hoogerbrugge ,  Wil Michiels

IPC: G06F21/14 ,  G06F21/62 ,  H04L9/30

Abstract: A method of obscuring the input and output of a modular exponentiation function, including: receiving modular exponentiation parameters including an exponent e having N bits and a modulus m; generating randomly a pre-multiplier; calculating a post-multiplier based upon the pre-multiplier, exponent e, and modulus m; multiplying an input to the modular exponentiation function by the pre-multiplier; performing the modular exponentiation function; and multiplying the output of the modular exponentiation function by the post-multiplier, wherein multiplying an input to the modular exponentiation function by the pre-multiplier, performing the modular exponentiation function, and multiplying the output of the modular exponentiation function by the post-multiplier are split variable operations.

公开(公告)号：US10235506B2

公开(公告)日：2019-03-19

申请号：US14815381

申请日：2015-07-31

Applicant: NXP B.V.

Inventor： Jan Hoogerbrugge ,  Wil Michiels

IPC: G06F21/14 ,  G06F7/72 ,  H04L9/00

Abstract: A method of obscuring software code implementing a modular exponentiation function, including: receiving modular exponentiation parameters including an exponent e having N bits; generating a bitwise exponent array and inverse bitwise exponent array; and generating modular exponentiation function operations using the bitwise exponent array, inverse bitwise exponent array, and N, wherein the generated modular exponentiation function operations are split variable operations.

公开(公告)号：US10097342B2

公开(公告)日：2018-10-09

申请号：US14814007

申请日：2015-07-30

Applicant: NXP B.V.

Inventor： Wil Michiels ,  Jan Hoogerbrugge ,  Philippe Teuwen

IPC: H04L29/06 ,  H04L9/00 ,  H04L9/06 ,  G06F21/72 ,  G06F21/14

Abstract: A method for a keyed cryptographic operation by a cryptographic system mapping an input message to an output message, including: receiving input data for the keyed cryptographic operation; calculating a first mask value based upon the input data; and applying the first mask value to a first intermediate value of the keyed cryptographic operation.

公开(公告)号：US10068114B1

公开(公告)日：2018-09-04

申请号：US15701764

申请日：2017-09-12

Applicant: NXP B.V.

Inventor： Jan Hoogerbrugge ,  Wilhelmus Petrus Adrianus Johannus Michiels ,  Joppe Willem Bos

IPC: G06K7/08 ,  G06K7/10 ,  G06K19/07 ,  G06N5/02 ,  G06N99/00

Abstract: A method for implementing a host card emulation (HCE) service in a remote near field communication (NFC) device is provided. In the method, a first command application protocol data unit (APDU) is received at the remote NFC device from an NFC reader. A first response to the first command APDU is computed. A second command APDU from the NFC reader is predicted that is likely to follow receipt of the first command APDU from the NFC reader. A second response to the predicted second command APDU is computed. A third command APDU is received from the NFC reader. It is determined if the prediction of the second command APDU matches the third command APDU. If the second and third command APDUs match, then the computed second response is send directly to the NFC reader without having to traverse a NFC stack.

公开(公告)号：US09838198B2

公开(公告)日：2017-12-05

申请号：US14219734

申请日：2014-03-19

Applicant: NXP B.V.

Inventor： Wil Michiels ,  Jan Hoogerbrugge

IPC: H04L9/28 ,  H04L9/00 ,  H04L29/06 ,  G09C1/00 ,  H04L9/06

CPC classification number: H04L9/002 ,  G09C1/00 ,  H04L9/0618 ,  H04L63/1466 ,  H04L2209/043 ,  H04L2209/16 ,  H04L2209/24

Abstract: A method of performing a keyed cryptographic operation mapping an input message to an output message, wherein the input message comprises m input data and the output message comprises m output data and wherein the cryptographic operation includes at least one round and the cryptographic operation specifies a substitution box for mapping input data into output data, including: transforming each of the m input data into n output data using n split substitution boxes, wherein the n split substitution boxes sum to the specified substitution box; and mixing and combining the m×n output data.

公开(公告)号：US09582190B2

公开(公告)日：2017-02-28

申请号：US14276793

申请日：2014-05-13

Applicant: NXP B.V.

Inventor： Friso Jedema ,  Jan R Brands ,  Timotheus van Roermund ,  Jan Hoogerbrugge ,  Piotr Polak

IPC: G06F1/00 ,  G06F3/06 ,  G06Q20/34 ,  G07F7/08

CPC classification number: G06F3/0604 ,  G06F3/0632 ,  G06F3/0679 ,  G06Q20/341 ,  G07F7/082

Abstract: A time manager controls one or more timing functions on a circuit. The time manager includes a data storage and a time calculator. The data storage device stores a first indication of a performance characteristic of a memory cell at a first time. The data storage device also stores a second indication of the performance characteristic of the memory cell at a second time. The time calculator is coupled to the data storage device. The time calculator calculates a time duration between the first time and the second time based on a change in the performance characteristic of the memory cell from the first indication to the second indication.

Abstract translation: 时间管理器控制电路上的一个或多个定时功能。 时间管理器包括数据存储和时间计算器。 数据存储装置在第一时间存储存储单元的性能特性的第一指示。 数据存储装置还在第二时间存储存储单元的性能特性的第二指示。 时间计算器耦合到数据存储装置。 时间计算器基于从第一指示到第二指示的存储器单元的性能特性的变化，计算第一时间和第二时间之间的持续时间。

公开(公告)号：US20170033921A1

公开(公告)日：2017-02-02

申请号：US14814007

申请日：2015-07-30

Applicant: NXP B.V.

Inventor： Wil Michiels ,  Jan Hoogerbrugge ,  Philippe Teuwen

IPC: H04L9/00 ,  G06F21/72 ,  G06F21/14 ,  H04L9/06

CPC classification number: H04L9/002 ,  G06F21/105 ,  G06F21/14 ,  G06F21/72 ,  G06F2221/0748 ,  H04L9/0625 ,  H04L9/0631 ,  H04L2209/046 ,  H04L2209/16

Abstract: A method for a keyed cryptographic operation by a cryptographic system mapping an input message to an output message, including: receiving input data for the keyed cryptographic operation; calculating a first mask value based upon the input data; and applying the first mask value to a first intermediate value of the keyed cryptographic operation.

Abstract translation: 一种用于通过将输入消息映射到输出消息的加密系统进行密钥加密操作的方法，包括：接收密钥加密操作的输入数据; 基于输入数据计算第一掩模值; 以及将所述第一掩码值应用于所述密钥密码操作的第一中间值。

公开(公告)号：US20160350520A1

公开(公告)日：2016-12-01

申请号：US14725801

申请日：2015-05-29

Applicant: NXP B.V.

Inventor： Wil Michiels ,  Jan Hoogerbrugge ,  Philippe Teuwen

IPC: G06F21/14 ,  H04L9/06 ,  G06F21/72 ,  H04L9/00

CPC classification number: G06F21/14 ,  G06F21/72 ,  G06F2221/0748 ,  H04L9/002 ,  H04L9/06 ,  H04L9/0631 ,  H04L2209/08 ,  H04L2209/16

Abstract: A non-transitory machine-readable storage medium encoded with instructions for execution by a keyed cryptographic operation by a cryptographic system mapping an input message to an output message, including: instructions for receiving input data for a round of the keyed cryptographic operation; instructions for determining the order of computing output portions for the round of the cryptographic function based upon portions of the input data; and instructions for computing the portions of the output data in the determined order based upon the input data.

Abstract translation: 一种非暂时的机器可读存储介质，其编码有用于通过将输入消息映射到输出消息的加密系统通过密钥加密操作执行的指令，包括：用于接收用于一轮密钥加密操作的输入数据的指令; 用于基于所述输入数据的部分来确定所述加密函数的所述一轮计算输出部分的顺序的指令; 以及用于基于输入数据以确定的顺序计算输出数据的部分的指令。

公开(公告)号：US20160328543A1

公开(公告)日：2016-11-10

申请号：US14815540

申请日：2015-07-31

Applicant: NXP B.V.

Inventor： Jan Hoogerbrugge ,  Wil Michiels

IPC: G06F21/14 ,  H04L9/30 ,  G06F21/62

CPC classification number: G06F21/14 ,  G06F21/629 ,  G06F2221/0748 ,  H04L9/302 ,  H04L9/3066 ,  H04L2209/046

Abstract: A method of obscuring the input and output of a modular exponentiation function, including: receiving modular exponentiation parameters including an exponent e having N bits and a modulus m; generating randomly a pre-multiplier; calculating a post-multiplier based upon the pre-multiplier, exponent e, and modulus m; multiplying an input to the modular exponentiation function by the pre-multiplier; performing the modular exponentiation function; and multiplying the output of the modular exponentiation function by the post-multiplier, wherein multiplying an input to the modular exponentiation function by the pre-multiplier, performing the modular exponentiation function, and multiplying the output of the modular exponentiation function by the post-multiplier are split variable operations.

Abstract translation: 一种模糊模幂函数的输入和输出的方法，包括：接收包括具有N位和模数m的指数e的模幂运算参数; 随机生成预乘数; 基于预乘数，指数e和模数m计算后乘数; 通过预乘数将输入与模幂运算函数相乘; 执行模幂运算; 并将乘幂函数乘以后乘法器，其中通过预乘数将输入与模幂运算函数相乘，执行模幂运算函数，并将模幂运算函数的输出乘以后乘法器 是分割变量操作。

公开(公告)号：US09485226B2

公开(公告)日：2016-11-01

申请号：US14263429

申请日：2014-04-28

Applicant: NXP B.V.

Inventor： Wil Michiels ,  Jan Hoogerbrugge

IPC: G06F21/51 ,  H04L29/06

CPC classification number: H04L63/0428 ,  G06F21/51 ,  H04L63/123

Abstract: A method of performing a cryptographic operation using a cryptographic implementation in a cryptographic system, including: receiving, by the cryptographic system, an identifying string value; receiving, by the cryptographic system, an input message; performing, by the cryptographic system, a keyed cryptographic operation mapping the input message into an output message wherein the output message is the correct result when the identifying string value equals a binding string value.

Abstract translation: 一种使用加密系统中的密码实现进行加密操作的方法，包括：密码系统接收识别字符串值; 通过加密系统接收输入消息; 通过加密系统执行将输入消息映射到输出消息中的密钥加密操作，其中当识别字符串值等于绑定字符串值时，输出消息是正确的结果。