Data query against an encrypted database

    公开(公告)号:US11893128B2

    公开(公告)日:2024-02-06

    申请号:US17346323

    申请日:2021-06-14

    CPC classification number: G06F21/6227 G06F16/215 G06F21/602

    Abstract: A query string for an encrypted database storing a plurality of encrypted data records is received from a requestor. The query string is segmented to obtain at least one word. The at least one word is encrypted with the irreversible encryption algorithm to obtain at least one encrypted word. At least one first encrypted item with a co-occurrence weight higher than a preset threshold based on the at least one encrypted word and a co-occurrence statistics model is acquired. The co-occurrence statistics model is built to provide co-occurrence weights, each indicating a probability that the at least one encrypted word appears in a first encrypted data item of the plurality of encrypted data records. At least one second encrypted data item corresponding to the at least one first encrypted data item is acquired from the plurality of encrypted data records.

    Authenticity verification of messages

    公开(公告)号:US10756907B2

    公开(公告)日:2020-08-25

    申请号:US15869154

    申请日:2018-01-12

    Abstract: Embodiments of the present disclosure relate to a method for verifying an authenticity of a message. The method comprises acquiring a first hash value corresponding to the message, and acquiring a verification code corresponding to the message. The method further comprises computing a second hash value based on the verification code and the message, and verifying the authenticity of the message by comparing the first hash value with the second hash value.

    Embedding, transmitting and receiving data in an audio file
    5.
    发明授权
    Embedding, transmitting and receiving data in an audio file 有权
    在音频文件中嵌入,发送和接收数据

    公开(公告)号:US09471698B1

    公开(公告)日:2016-10-18

    申请号:US14956583

    申请日:2015-12-02

    Abstract: Embodiments of the present invention provide a method and system for embedding, transmitting and receiving a Quick Response (QR) code in an audio file. Initially, a set of data representing a QR Code and an audio file is received. A third file is generated based on a combination of the QR code and the audio file. The third file is broadcasted and received by a device. Data representing the QR code is extracted from the third file and displayed as an object on the device.

    Abstract translation: 本发明的实施例提供了一种在音频文件中嵌入,发送和接收快速响应(QR)码的方法和系统。 最初,接收表示QR码和音频文件的一组数据。 基于QR码和音频文件的组合生成第三个文件。 第三个文件由设备广播和接收。 从第三个文件中提取表示QR码的数据,并将其显示为设备上的对象。

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