公开(公告)号：US11502835B2

公开(公告)日：2022-11-15

申请号：US16890801

申请日：2020-06-02

Applicant: STMicroelectronics S.r.l.

Inventor： Giulio Follero ,  Rosario Bosco

IPC: H04L9/30 ,  G06F7/72 ,  G06F17/11

Abstract: The present disclosure relates to a method and device for performing an elliptic curve cryptography computation comprising: twisting, by a first device based on a first index of quadratic or higher order twist (d), a first point (P′KB) on a first elliptic curve over a further elliptic curve twisted with respect to the first elliptic curve to generate a twisted key (PKB); transmitting the twisted key (PKB) to a further device; receiving, from the further device, a return value (ShS) generated based on the twisted key (PKB); and twisting, by the first device based on the first index of quadratic or higher order twist (d), the return value (ShS) over the first elliptic curve to generate a result (ShS′) of the ECC computation.

公开(公告)号：US09225696B2

公开(公告)日：2015-12-29

申请号：US14103086

申请日：2013-12-11

Applicant: STMICROELECTRONICS S.r.l.

Inventor： Vincenzo Pascariello ,  Rosario Bosco

IPC: H04L29/06 ,  H04L9/08 ,  G06F21/62 ,  G06F21/78

CPC classification number: H04L63/061 ,  G06F21/6218 ,  G06F21/6281 ,  G06F21/78 ,  G06F2221/2153 ,  H04L9/0844 ,  H04L63/08

Abstract: An access process for an electronic device includes storing encrypted partitions in a storage area of the electronic device, with each encrypted partition corresponding to a registered user. A secure element is received from a registered user, with the secure element storing a user key for decrypting an encrypted partition corresponding to the register user providing the user key. A temporary secure channel is established between the secure element and the electronic device, and a registered user associated to one of the encrypted partitions is authenticated in the electronic device. An identification of the registered user authenticated in the electronic device is transmitted to the secure device, and the user key of the authenticated registered user is transmitted from the secure element to the electronic device over the temporary secure channel.

Abstract translation: 电子设备的访问过程包括将加密分区存储在电子设备的存储区域中，每个加密分区对应于注册用户。 从注册用户接收安全元件，其中安全元件存储用于解密与提供用户密钥的注册用户对应的加密分区的用户密钥。 在安全元件和电子设备之间建立临时安全通道，并且在电子设备中认证与加密分区之一相关联的注册用户。 在电子设备中认证的注册用户的识别被发送到安全设备，并且经过认证的注册用户的用户密钥通过临时安全信道从安全元件发送到电子设备。