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    Method and device for performing substitution table operations
    1.
    发明授权
    Method and device for performing substitution table operations 有权

    公开(公告)号：US11265145B2

    公开(公告)日：2022-03-01

    申请号：US16281881

    申请日：2019-02-21

    Applicant: STMICROELECTRONICS (ROUSSET) SAS

    Inventor： Yanis Linge ,  Thomas Ordas ,  Pierre-Yvan Liardet

    IPC: H04L9/06 ,  H04L9/00

    Abstract: The disclosure concerns implementing, by a cryptographic circuit, a set of substitution operations of a cryptographic process involving a plurality of substitution tables. For each set of substitution operations of the cryptographic process, a series of sets of substitution operations are performed. One set of the series is a real set of substitution operations corresponding to the set of substitution operations of the cryptographic process. One or more other sets are dummy sets of substitution operations, each dummy set being based on a different permutation of said substitution tables.

    Method for randomly modifying the consumption profile of a logic circuit, and associated device
    3.
    发明授权
    Method for randomly modifying the consumption profile of a logic circuit, and associated device 有权

    公开(公告)号：US11049419B2

    公开(公告)日：2021-06-29

    申请号：US16186820

    申请日：2018-11-12

    Applicant: STMicroelectronics (Rousset) SAS

    Inventor： Alexandre Sarafianos ,  Thomas Ordas ,  Yanis Linge

    IPC: G09C1/00 ,  H03K19/003 ,  H04L9/00 ,  G06F21/75

    Abstract: In an embodiment, a circuit includes a supply terminal, a reference terminal, a logic circuit coupled between the supply terminal and the reference terminal, and an auxiliary circuit coupled to the logic circuit. The auxiliary circuit includes a plurality of switches configured to be controlled to produce random criterions. Each random criterion causes, on each transition of an output signal of the logic, an attenuation of a current flowing between a supply terminal of the circuit and a reference terminal of the circuit; or an increase of the current flowing between the supply terminal of the circuit and the reference terminal of the circuit; or an additional current flowing through the logic circuit on a current path not passing through the supply terminal; or no change in the current flowing between the supply terminal of the circuit and the reference terminal of the circuit.

    Integrated circuit chip stack
    5.
    发明授权
    Integrated circuit chip stack 有权

    公开(公告)号：US10473709B2

    公开(公告)日：2019-11-12

    申请号：US16125096

    申请日：2018-09-07

    Applicant: STMicroelectronics (Rousset) SAS

    Inventor： Alexandre Sarafianos ,  Thomas Ordas

    IPC: H01L23/00 ,  G01R31/12 ,  G06K19/073 ,  H01L25/065 ,  G01R31/317 ,  H01L23/538

    Abstract: An integrated circuit chip stack includes a main integrated circuit chip and at least one auxiliary integrated circuit chip. The main integrated circuit chip contains circuit components to be protected. The auxiliary integrated circuit chip is mounted to a surface of the main integrated circuit chip and includes a metal plane connected to ground located opposite the circuit components to be protected. The auxiliary integrated circuit chip further includes at least one insulated conductive track forming a tight pattern opposite the circuit components to be protected. A detection circuit is connected to the at least one conductive track and is configured to detect interruption of the at least one insulated conductive track.

    Method and circuit for performing a substitution operation
    6.
    发明授权
    Method and circuit for performing a substitution operation 有权

    公开(公告)号：US11218291B2

    公开(公告)日：2022-01-04

    申请号：US16281889

    申请日：2019-02-21

    Applicant: STMICROELECTRONICS (ROUSSET) SAS

    Inventor： Thomas Ordas ,  Yanis Linge

    IPC: H04L9/06 ,  G06F21/72

    Abstract: A cryptographic circuit performs a substitution operation of a cryptographic algorithm. For each substitution operation of the cryptographic algorithm, a series of substitution operations are performed by the cryptographic circuit. One of the substitution operations of the series is a real substitution operation corresponding to the substitution operation of the cryptographic algorithm. One or more other substitution operations of the series are dummy substitution operations. A position of the real substitution operation in said series is selected randomly.

    Electronic chip architecture
    10.
    发明授权
    Electronic chip architecture 有权

    公开(公告)号：US10734329B2

    公开(公告)日：2020-08-04

    申请号：US15801517

    申请日：2017-11-02

    Applicant: STMicroelectronics (Rousset) SAS

    Inventor： Alexandre Sarafianos ,  Thomas Ordas

    IPC: H01L21/56 ,  H01L23/00 ,  H01L27/118 ,  H01L27/02

    Abstract: In some embodiments, an electronic chip includes a doped semiconductor substrate of a first conductivity type, and wells of the second conductivity type on the side of the front face of the chip, in and on which wells circuit elements are formed. One or more slabs of a second conductivity type are buried under the wells and are separated from the wells. The electronic chip also includes, for each buried slab, a biasable section of the second conductivity type, which extends from the front face of the substrate to the buried slab. A first MOS transistor with a channel of the first conductivity type is disposed in the upper portion of each section, where the first transistor is an element of a flip-flop. A circuit is used for detecting a change in the logic level of one of the flip-flops.

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