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    Keys for elliptic curve cryptography
    1.
    发明授权
    Keys for elliptic curve cryptography 有权

    公开(公告)号：US11831771B2

    公开(公告)日：2023-11-28

    申请号：US17506377

    申请日：2021-10-20

    Applicant: STMICROELECTRONICS S.r.l. ,  PROTON WORLD INTERNATIONAL N.V.

    Inventor： Thierry Simon ,  Michael Peeters ,  Francesco Caserta

    IPC: H04L9/30 ,  H04L9/08 ,  H04L9/32

    CPC classification number: H04L9/3073 ,  H04L9/0838 ,  H04L9/3247 ,  H04L2209/12

    Abstract: Cryptographic circuitry, in operation, generates N first pairs of elliptic curve cryptography (ECC) keys r(i), R(i), with i varying from 1 to N, using K second pairs of ECC keys p(k), P(k), with k varying from 1 to K, wherein K is smaller than N. Each pair r(i), R(i) of the first pairs of keys is a linear combination of pairs of the second pairs of ECC keys according to:





    ∀
    i

    ∈


    [

    1
    ;
    N

    ]

    ⁢

    {






    r
    ⁡
    (
    l
    )

    =


    ∑

    j
    =
    1

    K



    A
    ⁡
    (

    i
    ,
    j

    )

    *

    p
    ⁡
    (
    j
    )










    R
    ⁡
    (
    i
    )

    =


    ∑

    j
    =
    1

    K



    A
    ⁡
    (

    i
    ,
    j

    )

    *

    P
    ⁡
    (
    j
    )







    ,







    wherein A(i,j) designates a general term of a matrix A of size N*K, and all the sub-matrices of size K*K are invertible. The cryptographic circuitry, in operation, executes cryptographic operations using one or more pairs of the first pairs of ECC keys.

    Monotonic counter
    2.
    发明授权
    Monotonic counter 有权

    公开(公告)号：US11715506B2

    公开(公告)日：2023-08-01

    申请号：US17691870

    申请日：2022-03-10

    Applicant: PROTON WORLD INTERNATIONAL N.V.

    Inventor： Michael Peeters ,  Jean-Louis Modave ,  Ronny Van Keer

    IPC: G11C8/04 ,  G11C7/20

    CPC classification number: G11C8/04 ,  G11C7/20

    Abstract: A monotonic counter stores N binary words representing a value in N memory cells. When i memory cells of consecutive ranks between k modulo N and k+i modulo N each represent a value complementary to a null value, the counter is incremented by erasing a value of a memory cell of rank k+i+1 modulo N. When i+1 memory cells of consecutive ranks between k+1 modulo N and k+i+1 modulo N each represent the value complementary to the null value, the counter is incremented by incrementing a value of a memory cell of rank k modulo N by two step sizes and storing a result in a memory cell of rank k+1 modulo N, wherein, N is an integer greater than or equal to five, k is an integer, and i is an integer between 2 and N−3.

    Read-once memory
    4.
    发明授权
    Read-once memory 有权

    公开(公告)号：US11049567B2

    公开(公告)日：2021-06-29

    申请号：US16708316

    申请日：2019-12-09

    Applicant: PROTON WORLD INTERNATIONAL N.V.

    Inventor： Michael Peeters

    IPC: G11C16/14 ,  G11C16/26 ,  G11C16/32 ,  H03K19/20

    Abstract: A memory includes a rewritable non-volatile memory cell and input circuitry coupled to the memory cell. The input circuitry, in operation, erases the memory cell in response to reception of a request to read the memory cell. Similarly, a read-once memory includes an addressable, non-volatile memory having a plurality of rewriteable memory cells. Input circuitry coupled to the non-volatile memory responds to reception of a request to read content stored at an address in the non-volatile memory by erasing the content stored at the address of the non-volatile memory.

    MEMORY STORAGE DEVICE AND METHOD
    8.
    发明申请
    MEMORY STORAGE DEVICE AND METHOD 有权

    公开(公告)号：US20220327064A1

    公开(公告)日：2022-10-13

    申请号：US17653382

    申请日：2022-03-03

    Applicant: Proton World International N.V.

    Inventor： Michael Peeters

    IPC: G06F12/14 ,  G06F12/02

    Abstract: The present disclosure relates to secure storage, in a non-volatile memory, of initial data encrypted using a second data, including selecting a pointer aimed at an initial address of a memory cell of an initial part of the non-volatile memory, and encrypting the pointer using the second data; and-storing the encrypted pointer in the non-volatile memory.

    Monotonic counter
    10.
    发明授权
    Monotonic counter 有权

    公开(公告)号：US11776601B2

    公开(公告)日：2023-10-03

    申请号：US17691881

    申请日：2022-03-10

    Applicant: PROTON WORLD INTERNATIONAL N.V.

    Inventor： Jean-Louis Modave ,  Michael Peeters ,  Ronny Van Keer

    IPC: G11C8/04 ,  G11C7/20

    CPC classification number: G11C8/04 ,  G11C7/20

    Abstract: The present disclosure relates to a monotonic counter whose value is represented by a number N of binary words of N memory cells of a non-volatile memory, and being able to implement a step increment operation wherein if only one first memory cell represents a first value different from zero, then a second value equal to the said first value incremented by two times the said step is written into a second memory cell of rank directly higher than the rank of the first memory cell; and if a third and a fourth memory cell of consecutive ranks represent, respectively, a third value and a fourth value different from zero, then the third value of the third memory cell of lower rank is erased.

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