32results about How to "Prevent knowing" patented technology

The invention discloses command decoding device and method for disordered coded commands. The command decoding device for the disordered coded commands comprises a selection unit and at least one decoding unit, wherein the selection unit is provided with at least two inputs and at least one output, the at least two inputs are used for inputting at least two disordered coded command data, the at least output is used for outputting at least one disordered coded command data, the selection unit is configured to select at least one disordered coded command data from the at least two disordered coded command data and distribute the selected disordered coded command data to the corresponding output; and the at least decoding unit is respectively coupled with the corresponding output of the at least one output and used for receiving the selected disordered coded command data and decoding the selected disordered coded command data correspondingly.

The invention discloses command decoding device and method for disordered coded commands. The command decoding device for the disordered coded commands comprises a selection unit and at least one decoding unit, wherein the selection unit is provided with at least two inputs and at least one output, the at least two inputs are used for inputting at least two disordered coded command data, the at least output is used for outputting at least one disordered coded command data, the selection unit is configured to select at least one disordered coded command data from the at least two disordered coded command data and distribute the selected disordered coded command data to the corresponding output; and the at least decoding unit is respectively coupled with the corresponding output of the at least one output and used for receiving the selected disordered coded command data and decoding the selected disordered coded command data correspondingly.

The invention provides a safe storage device, system and method. The device comprises a main control unit, a storage unit and an encryption unit, wherein the main control unit is used for generating acontrol instruction according to a terminal request and sending the control instruction to the storage unit; the storage unit is used for determining first secret key information, corresponding to the control instruction, of a user according to the logic address of the received control instruction and sending the first secret key information to the encryption unit; the encryption unit is used forreceiving the first secret key information sent by the storage unit and second secret key information sent by a terminal, and generating a data secret key according to the first secret key information and the second secret key information. The invention provides the safe storage device, system and method. By additionally arranging the encryption unit, the secret key information is stored separately, a secret key can be effectively prevented from being known by an illegal user, the safety of the secret key is guaranteed, and the data safety is ensured.

The invention provides a safe query method, device and system of high-dimensional spatial data. The method comprises the following steps: a data owner sends K quantization center sets, the random indexes of each coarse cluster and a codebook to private cloud, sends an encrypted outsourced database, the random indexes of each coarse cluster, the quantization code of each encrypted data point and a homomorphic private key to a server and sends a homomorphic encrypted distance table and an encryption key to a data user; and the data user obtains the random indexes independently corresponding to w coarse clusters and the quantization code of the query point form the private cloud, obtains the quantization code of each data point and k encrypted data points in the w coarse clusters, and carries out encryption to obtain k query results. According to the scheme, the data in the outsourced database and data user query contents can be effectively prevented from being pried by the server, and the user can be prevented from prying into data except the query content of the user.

The invention discloses a multi-layer encryption privacy protection method used for content-centric networking. The multi-layer encryption privacy protection method comprises the steps that: a requester sends an interest package used for creditability validation to a publisher of content, and the publisher responds to the requestor; the requestor sequentially uses a publisher public key and a router public key for encrypting the requested interest packet, and sends the requested interest packet to a router; the router decrypts the requested interest packet by using a private key to obtain information it needs, and then forwards the requested interest packet to the next-layer router until the requested interest packet is sent to the publisher; the publisher decrypts the requested interest packet by using a publisher private key, validates the creditability of the requester, responds to the requested interest packet when the validation passes, and sends data to the router; and the router decrypts a data packet by using a private key to obtain response data, and forwards the response data to the next-level router until the response data is forwarded to the requester. The multi-layer encryption privacy protection method adopts the public keys for encryption, is relatively high in security, and can protect the privacy of the requestor and the publisher to a greater extent.

The invention discloses a recommendation method based on privacy protection. A semi-trusted third-party organization is set in the user and the e-commerce platform server. The e-commerce platform server discloses the feature vectors of all commodities, and the user obtains the commodity feature vectors from the server. Its own purchase data learns its user feature vector locally, and calculates the update gradient of the product feature vector based on it, and uses the global noise vector and temporary noise for disturbance and sends it to a semi-trusted third-party organization, and a semi-trusted third-party organization Aggregate the disturbed update gradients and send them to the server. The server removes the disturbance from the received update gradients, and then updates the product feature vector. The user then calculates the predicted interaction vector based on the updated product feature vector, and thus obtains product recommendations. result. Adoption of the present invention can effectively realize the protection of user privacy in the commodity recommendation process.

The objective of the invention is provided with an automatic transaction device, which will not reveal the accounting number and the code even if the other person can observe the action of the client or record it using a camera, the card of the client is not able to be abused. A transacted guiding image, as a solving means, is showed by arbitrarily switching the image identified by the vision from the first angle of field of view and the image identified by the vision from the second angle of field of view in the automatic transaction device, or is showed by dividing a guiding image into a image of each direction in the first field of view and a a image of each direction in the second field of view.