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    ENCRYPTED SEARCH CLOUD SERVICE WITH CRYPTOGRAPHIC SHARING
    1.
    发明申请
    ENCRYPTED SEARCH CLOUD SERVICE WITH CRYPTOGRAPHIC SHARING 有权

    公开(公告)号：US20250045448A1

    公开(公告)日：2025-02-06

    申请号：US18923613

    申请日：2024-10-22

    Applicant: Google LLC

    Inventor： Kevin Yeo ,  Sarvar Patel ,  Giuseppe Persiano

    IPC: G06F21/62 ,  H04L9/06 ,  H04L9/08 ,  H04L9/32 ,  H04L9/40

    Abstract: A method for sharing read access to a document stored on memory hardware. The method includes receiving a shared read access command from a sharor sharing read access to a sharee for a document stored on memory hardware in communication with the data processing hardware, and receiving a shared read access request from the sharee. The shared read access command includes an encrypted value and a first cryptographic share value based on a write key, a read key, a document identifier, and a sharee identifier. The method also includes multiplying the first and second cryptographic share values to determine a cryptographic read access value. The cryptographic read access value authorizes read access to the sharee for the document. The method also includes storing a read access token for the sharee including the cryptographic read access value and the encrypted value in a user read set of the memory hardware.

    Oblivious access with differential privacy
    2.
    发明授权
    Oblivious access with differential privacy 有权

    公开(公告)号：US11727124B2

    公开(公告)日：2023-08-15

    申请号：US16623311

    申请日：2018-01-12

    Applicant: Google LLC

    Inventor： Kevin Yeo ,  Sarvar Patel ,  Giuseppe Persiano

    IPC: G06F21/60 ,  G06F16/2458 ,  G06F3/06 ,  G06F12/14 ,  G06F21/62

    CPC classification number: G06F21/602 ,  G06F3/064 ,  G06F3/067 ,  G06F3/0623 ,  G06F12/1408 ,  G06F16/2471 ,  G06F21/6227 ,  G06F2212/1052 ,  G06F2221/2123

    Abstract: A method executing an instruction (300) to execute a query (q) for a data block (102) and determining whether the data block is stored in a block stash (370). When the data block is stored in the block stash during a download phase, the method includes removing the data block from the block stash, sending a fake query (304) to a distributed system (140) to retrieve a random data block stored in memory (114) of a distributed system (140), and discarding the random data block. When a current version of the data block is stored in the block stash during an overwrite phase, the method includes sending a fake query to the distributed system to retrieve another random data block stored in the memory of the distributed system, decrypting and re-encrypting the random data block with fresh randomness, and re-uploading the re-encrypted random data block onto the distributed system.

    Encrypted Search with a Public Key
    4.
    发明申请
    Encrypted Search with a Public Key 有权

    公开(公告)号：US20210184840A1

    公开(公告)日：2021-06-17

    申请号：US16712487

    申请日：2019-12-12

    Applicant: Google LLC

    Inventor： Kevin Yeo ,  Sarvar Patel

    IPC: H04L9/08 ,  H04L9/06 ,  G06F16/93 ,  G06F16/903 ,  G06F16/9032

    Abstract: A method for searchable encryption with a public key includes receiving an operation request front a user device associated with a user requesting that encryption of data associated with the user. The data includes a corpus of documents stored on a remote storage device. The method also includes receiving a public key associated with the user. The public key includes an asymmetric cryptographic public key. The method also includes generating a random data key. The data key includes a symmetric cryptographic key. The method also includes encrypting, using the data key, a search index for the corpus of documents based on keywords within the corpus of documents. The method also includes encrypting, using the public key, the data key and sending the encrypted data key to a user device associated with the user.

    Encrypted Search System Design for Email Client-Side Encryption
    5.
    发明申请
    Encrypted Search System Design for Email Client-Side Encryption 有权

    公开(公告)号：US20210182408A1

    公开(公告)日：2021-06-17

    申请号：US16713872

    申请日：2019-12-13

    Applicant: Google LLC

    Inventor： Kevin Yeo ,  Ahmet Erhan Nergiz ,  Laetitia Estelle Baudoin ,  Nicolas Lidzborski ,  Sarvar Patel

    IPC: G06F21/60 ,  H04L29/06 ,  H04L9/00 ,  H04L9/06

    Abstract: A method for providing an encrypted search system includes receiving a search query for a keyword that appears in one or more encrypted emails stored on an untrusted storage device and accessing, a count table to obtain a count of unique emails within the emails that include the keyword. The method also includes generating a delegatable pseudorandom function (DPRF) based on the keyword, a private cryptographic key, and the count of unique emails that include the keyword and delegating at least a portion of the DPRF to the untrusted storage device that causes the storage device to evaluate the delegated DPRF, access an encrypted search index associated with the emails, and determine one or more encrypted emails associated with the delegated DPRF based on the encrypted search index. The storage device also returns, to the user device, an identifier for each encrypted email associated with the delegated DPRF.

    Encrypted search cloud service with cryptographic sharing
    6.
    发明授权
    Encrypted search cloud service with cryptographic sharing 有权

    公开(公告)号：US12141315B2

    公开(公告)日：2024-11-12

    申请号：US18159674

    申请日：2023-01-25

    Applicant: Google LLC

    Inventor： Kevin Yeo ,  Sarvar Patel ,  Giuseppe Persiano

    IPC: H04L29/06 ,  G06F21/62 ,  H04L9/06 ,  H04L9/08 ,  H04L9/32 ,  H04L9/40

    Abstract: A method for sharing read access to a document stored on memory hardware. The method includes receiving a shared read access command from a sharor sharing read access to a sharee for a document stored on memory hardware in communication with the data processing hardware, and receiving a shared read access request from the sharee. The shared read access command includes an encrypted value and a first cryptographic share value based on a write key, a read key, a document identifier, and a sharee identifier. The method also includes multiplying the first and second cryptographic share values to determine a cryptographic read access value. The cryptographic read access value authorizes read access to the sharee for the document. The method also includes storing a read access token for the sharee including the cryptographic read access value and the encrypted value in a user read set of the memory hardware.

    Response-Hiding Searchable Encryption
    8.
    发明公开
    Response-Hiding Searchable Encryption 审中-公开

    公开(公告)号：US20230274007A1

    公开(公告)日：2023-08-31

    申请号：US18312556

    申请日：2023-05-04

    Applicant: Google LLC

    Inventor： Kevin Yeo ,  Sarvar Patel ,  Giuseppe Persiano

    IPC: G06F21/60 ,  G06F21/62 ,  H04L9/08

    CPC classification number: G06F21/602 ,  G06F21/6227 ,  H04L9/0894 ,  G06F2221/2107 ,  G06F2221/0751

    Abstract: A method for providing response-hiding searchable encryption includes receiving a search query for a keyword from a user device associated with a user. The keyword appears in one or more encrypted documents within a corpus of encrypted documents stored on an untrusted storage device. The method also includes accessing a document oblivious key-value storage (OKVS) to obtain a list of document identifiers associated with the keyword. Each document identifier in the list of document identifiers associated with a respective keyword identifier is concatenated with the keyword and uniquely identifies a respective one of the one or more encrypted documents that the keyword appears in. The method also includes returning the list of document identifiers obtained from the document OKVS to the user device.

    Private Information Retrieval with Sublinear Public-Key Operations
    9.
    发明公开
    Private Information Retrieval with Sublinear Public-Key Operations 审中-公开

    公开(公告)号：US20230185960A1

    公开(公告)日：2023-06-15

    申请号：US18167490

    申请日：2023-02-10

    Applicant: Google LLC

    Inventor： Sarvar Patel ,  Kevin Yeo ,  Giuseppe Persiano

    IPC: G06F21/62 ,  G06F17/16 ,  G06F21/60 ,  H04L9/00

    CPC classification number: G06F21/6245 ,  G06F17/16 ,  G06F21/602 ,  H04L9/008

    Abstract: A method includes initializing a client state on a client device be executing a private batched sum retrieval instruction to compute c sums O of data blocks from an untrusted storage device. Each computed sum O stored on memory hardware of the client device and including a sum of a corresponding subset S of exactly k data blocks. The method also includes a query instruction to retrieve a query block Bq stored on the untrusted storage device by iterating through each of the c sums O of data blocks to identify one of the c sums O that does not include the query block Bq, instructing a service to pseudorandomly partition the untrusted storage device into partitions and sum the data blocks in each partition to determine a corresponding encrypted data block sum.

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