46results about How to "Guaranteed privacy protection" patented technology

The invention discloses a secure transaction method and device based on a block chain. The node end equipment of the block chain calls the smart contract based on the contract information, the node end of the block chain decrypts the encrypted transaction parameters in the contract information by using the public key in the certificate, and executes the smart contract based on the transaction parameters; after the block chain node achieves consensus on the execution result in the block chain; wherein the node encrypts a key and a value based on the certificate public key and then writes the key and the value into the node database, the client inquires a transaction result through the blockchain node and needs to encrypt transaction parameters, the blockchain node needs to decrypt based onthe public key and then encrypt and return the transaction result, and the client decrypts based on the private key to obtain a plaintext result. Through the technical scheme of the invention, data security and data privacy protection for transaction and query can be formed.

The invention belongs to the field of machine learning and privacy protection, and particularly relates to a decision tree classification service system and method supporting privacy protection. The service system comprises a model owner module, a client module, a cloud service module and a ciphertext operation module. The method comprises a preparation stage and a classification stage. The invention provides a decision tree classifier supporting privacy protection orienting cloud encryption data, and designs and implements a decision tree classification service system supporting privacy protection. Original data cannot be recovered through encrypted data uploaded by a user, privacy protection in the outsourcing calculation process is guaranteed, large-scale data are outsourced to a third-party server which is high in storage and calculation resource, local infrastructure investment and management of the user are reduced, and then more economic benefits are generated.

The invention discloses an on-line fingerprint authentication system and method based on bidirectional privacy protection. With the system and method, a problem that bidirectional privacy protection of fingerprint data of the user and fingerprint template data is not involved in the prior art can be solved. The system is composed of a trusted center (1), a fingerprint authentication server (2), and a user terminal (3). The trusted center (1) completes system initialization, provides registration and secret key distribution for a user terminal and the fingerprint authentication server, collects a user fingerprint as an authentication template, and gives authorization of the template to a legal fingerprint authentication server in a ciphertext mode; the fingerprint authentication server (2) provides an on-line encryption fingerprint authentication service with privacy protection and returns an authentication result to the user terminal; and the user terminal (3) sends an encrypted fingerprint authentication request to the fingerprint authentication server and decrypts the reply of the fingerprint authentication server to obtain an authentication result. According to the invention, bidirectional privacy protection of the user fingerprint data and the fingerprint template data is realized and a secure on-line fingerprint authentication service is provided.

The invention discloses a privacy budget allocating and data publishing method for protecting the data query privacy. The privacy budget allocating and data publishing method includes steps of firstly, setting privacy budget parameters, to be more specific, giving privacy budgets of data by data administrators according to importance degrees of the data, denoting the privacy budgets of the data asepsilon, setting basic query frequencies of the data and denoting the basic query frequencies of the data as k; secondly, computing privacy budgets of each query; thirdly, acquiring the sensitivity delta f of the query according to the query f submitted by users, combining the sensitivity delta f with the privacy budget epsilon allocated to the query, and computing required-to-be-added noise forquery results by the aid of difference privacy protection algorithms so as to obtain query results with the noise; fourthly, returning the query results with the noise according to the query submittedby the users so as to protect the privacy of the data. The privacy budget allocating and data publishing method has the advantages that the privacy can be protected in data publishing procedures, accomplice attack can be resisted, the precision of first k times of query can be guaranteed, and the problem of excessively low data availability due to the fact that existing privacy budgets are infinitely allocated can be solved by the aid of the privacy budget allocating and data publishing method.

The invention provides a distributed compressed sensing data fusion method having the privacy protection effect and relates to the field of wireless networks. A privacy protection fusion method based on data sparsity position information hiding is designed in a distributed scene, and by the adoption of data sparsity support set feature learning, real data sparsity position hiding and distributed compressed sensing fusion observation, the additional communication cost brought by a traditional privacy protection fusion method is avoided, and data processing of sensor networks is facilitate. The data privacy protection fusion method has the obvious data privacy protection effect on the sensor networks, meanwhile can effectively reduce network energy consumption and improve the algorithm efficiency and the data processing performance by utilizing a distributed compressed sensing fusion strategy, and facilitates user management, network application and scale expanding.

The invention discloses a system and a method for location based service-orientated user privacy protection, which mainly solve the problems of poor safety and low processing efficiency of the existing scheme. The system comprises a location based server, an outsourced cloud server and a user terminal, wherein the location based server is used for finishing system initialization, providing registration and secret key distribution for the user terminal and the outsourced cloud server; the outsourced cloud server is used for storing enciphered data resources, calculating for the user terminal to obtain the query result needed by a user and sending the query result to the user terminal; the user terminal is used for sending a service request to the outsourced cloud server, and decrypting the data information list returned by the outsourced cloud server to obtain the query result; the user terminal and the outsourced cloud server carry out bidirectional authentication in a service. The system and the method disclosed by the invention realize privacy protection for the location information of the user and data resources, increases the system efficiency, and can be used for providing safe and fast dinning, entertainment and travel information for the user in actual life.

The invention relates to an object naming service (ONS) architecture with decentralized management-based electronic produce code (EPC) parsing method. The EPC parsing method comprises the following steps that: firstly, a URI Conversion unit reads a company prefix in an object code and determines a country code top level domain (ccTLD) area which the object code is located at; secondly, the URI Conversion unit carries out conversion on the object code, adds the ccTLD information, and constructs a complete domain name; thirdly, an ONS resolver unit receives the converted domain name and carries out parsing according to a normal DNS query flow until a name server of the domain name returns a corresponding naming authority pointer (NAPTR) record; and fourthly, a Local System unit accesses a corresponding an EPC information server (EPC IS) or EPC discovery server (EPC DS) according to the NAPTR record so as to obtain related information of the object. According to the invention, querying time delay and expenditure of the ONS can be optimized; and privacy protection of object information by all sovereign states and areas can be guaranteed.

The invention provides an edge cloud collaborative computing resources transaction method, computer equipment and a storage medium, and the method comprises the steps that S1, a resources requester broadcasts resources unit price demand data and resources distribution mode data, and resources providers broadcast lowest resources unit price data and yielding capability data for resources prices toa blockchain network; S2, the resource requester calculates a first satisfaction index for the plurality of resources providers; S3, the resource providers calculate a second satisfaction index of theresource requester; S4, the overall satisfaction degree of the transactions is calculated in a blockchain network, and when the overall satisfaction degree of the transactions is an optimal solution,resources transactions reach agreements and the resources transactions are optimized; S5, the blockchain network is requested for a resources transaction optimization result; and S6, the resource requester and the resource providers share resources according to the optimization result. According to the invention, all parties participating in sharing can obtain the maximum benefit sum.

The invention discloses a network access block chain equipment based on block chain and data processing method and device, and the method comprises the steps: the network access block chain equipmentestablishes an index for data, and sends the data to an interstellar file system for storage; the network access block chain device receives a storage address of the data returned by the interstellarfile system; and the network access block chain device stores the storage address and the index information to a contract account through a block chain. According to the embodiment of the invention, the method comprises the following steps that: network access block chain equipment establishes an index for data, and sends the data to an interstellar file system for storage; the network access block chain device stores the storage address and the index information to the contract account through the block chain, so that the data is stored through the interstellar file system, the decentration of the storage is realized, and the privacy protection of the data can be ensured.

The invention relates to the field of medical information query, in particular to a regional medical information sharing and query system, which comprises a medical server, a data storage unit, a networking information query unit, a secret key decoding verification unit, a user server, an identity information recording unit and a secret key access generation unit, wherein the user server is a mobile server for patients; the identity information recording unit records identity information of each patient, generates a unique identity identification code and records regional information and treatment records of the patients at the same time; the identities of the patients are identified through using the secret key access generation unit, unique access keys are generated according to an encryption algorithm, the secret key decoding verification unit carries out decoding calculation on the access secret keys and is connected to the networking information query unit after verification, thenetworking information query unit carries out access connection on the corresponding secret keys and carries out information query according to requirements, and the medical service terminal is arranged on a networking server of each medical institution.

The invention relates to the field of big data processing, and discloses a big data security privacy protection method based on geometric deformation and a storage medium. The method comprises the following steps: establishing an attribute sensitive set: dividing attributes of data into four sets which represent four sensitive degrees; cleaning data: deleting incomplete data entries, and serializing discrete data to obtain to-be-divided data; dividing data: screening out data corresponding to all attributes in the same sensitive set, and classifying the data into different columns of the samematrix to form a homosensitive data set; carrying out geometric deformation: carrying out corresponding translation, scaling, rotation or similar transformation processing on the homosensitive data set, and recording transformation parameters so as to be used in subsequent inverse transformation processing; and obtaining a final data set, wherein the four data sets after transformation processingare one data set. A concise, efficient and graded data privacy protection method can be provided for release and transmission of mass data, and data restoration can be achieved through geometric deformation inverse transformation.

The invention discloses an acceptance bill management method based on a block chain. The method enables the block chain technology to be applied to bank acceptance bill business, and solves problems that a conventional bank acceptance bill business is liable to be counterfeited, is slow in transaction, achieves the illegal transaction, is discontinuous in endorsement, and is large in resource consumption. Meanwhile, secure multi-party computing technology is applied to the bank acceptance bill business, privacy protection of account book information of all nodes is guaranteed, and the problemthat traditional bank acceptance bill business is poor in confidentiality is solved. Meanwhile, applicant information is obtained, applicant credit is verified, risk judgment is provided for the ticket holder, and unnecessary loss of the ticket holder is further reduced or prevented.

The invention relates to a payment information processing method and a device thereof. The method comprises the following steps: receiving a first two-dimensional code sent by a payee address; performing two-dimensional code analysis processing on the first two-dimensional code to generate a first payment information sequence; calling a payment processing interface to perform payment processing according to the first payment information sequence; performing data conversion processing on result data returned by the payment processing interface to generate first encrypted reconciliation information; performing two-dimensional code conversion processing on the first encrypted reconciliation information, and sending back conversion processing result data to the address of the payee; according to the embodiment of the invention, the security and privacy of data transmission are ensured, and the payment efficiency is improved.