公开(公告)号：US20160308673A1

公开(公告)日：2016-10-20

申请号：US14671019

申请日：2015-03-27

Applicant: STMicroelectronics (Rousset) SAS

Inventor： Pierre-Yvan Liardet ,  Yannick Teglia ,  Jerome Tournemille

IPC: H04L9/08

CPC classification number: G06F21/75 ,  G06F21/72 ,  G06F2221/2105 ,  H04L9/004

Abstract: A device includes one or more registers and circuitry. The circuitry subjects a key having a number of bits to a first function which takes a selection value into account, generating a result having a number of bits which is twice the number of bits of the key, and stores the result in the one or more registers. In response to a call for the key, the circuitry subjects the result stored in the one or more registers to a second function which takes the selection value into account to generate a response having a same value as the key.

Abstract translation: 设备包括一个或多个寄存器和电路。 该电路将具有多个比特的密钥作为考虑到选择值的第一功能，产生具有该密钥比特数的两倍的比特数的结果，并将该结果存储在一个或多个 注册 响应于对键的调用，电路对存储在一个或多个寄存器中的结果进行考虑到选择值的第二函数，以产生具有与该键相同的值的响应。

公开(公告)号：US09558375B2

公开(公告)日：2017-01-31

申请号：US14671019

申请日：2015-03-27

Applicant: STMicroelectronics (Rousset) SAS

Inventor： Pierre-Yvan Liardet ,  Yannick Teglia ,  Jerome Tournemille

IPC: G06F21/75 ,  G06F21/72 ,  H04L9/00

CPC classification number: G06F21/75 ,  G06F21/72 ,  G06F2221/2105 ,  H04L9/004

Abstract: A device includes one or more registers and circuitry. The circuitry subjects a key having a number of bits to a first function which takes a selection value into account, generating a result having a number of bits which is twice the number of bits of the key, and stores the result in the one or more registers. In response to a call for the key, the circuitry subjects the result stored in the one or more registers to a second function which takes the selection value into account to generate a response having a same value as the key.

Abstract translation: 设备包括一个或多个寄存器和电路。 该电路将具有多个比特的密钥作为考虑到选择值的第一功能，产生具有该密钥比特数的两倍的比特数的结果，并将该结果存储在一个或多个 注册 响应于对键的调用，电路对存储在一个或多个寄存器中的结果进行考虑到选择值的第二函数，以产生具有与该键相同的值的响应。