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5069results about How to "Privacy protection" patented technology

Method and system for privacy protection of block chain transaction

The invention provides a method and system for privacy protection of block chain transaction. The method comprises: a transaction group is established between nodes of a block chain system, a user establishes an account at a node, and the node generates public and private key information of the account and then joining of a group is carried out; a transaction request node encrypts transaction information by using a broadcast encryption algorithm, carries out group signature processing on the encrypted transaction information, and then broadcasts the transaction information after broadcast encryption and group signature processing; a common non-account-recording node verifies the transaction information and then broadcasts the transaction information, an account-recording node decrypts thetransaction information and performs an intelligent contract to carry out account recording, broadcast encryption is carried out and then the information is recorded into a public account book, wherein the stored data are only allowed to be opened by the account-recording node, the transaction request node and an administration node. With the broadcast encryption algorithm and group signature technology, a privacy protection problem in the block chain system is solved and the traceability of the transaction is ensured.
Owner:JUZIX TECH SHENZHEN CO LTD +1

Internet of Things identity authentication method based on blockchain

The invention belongs to the technical field of identity authentication, and specifically provides an Internet of Things identity authentication method based on a blockchain. The basic steps of the Internet of Things identity authentication method provided by the invention are as follows: an entity calls an intelligent contract by means of an own key to accomplish the registration in an identity authentication system; each entity can call the intelligent contract to set an access strategy so as to limit the access of other entities to the entity and to form a trust network of the Internet of Things; when one entity accesses the data of the other entity, the entity needs to apply for a token from the intelligent contract to obtain the access qualification, and the intelligent contract checks whether the entity initiating the access has the access qualification according to the access strategy set by the accessed entity in the trust network between the entities, and if yes, the intelligent contract generates the token and returns the token to the entity initiating the access; or otherwise, the intelligent contract returns token application failure information. By adoption of the method provided by the invention, a centralized authority mechanism in an identity authentication process is removed, malicious tampering of records of identity authentication and data access is prevented, a strategy execution result is not manually manipulated, and a fair, transparent and credible execution environment is provided for the identity authentication of the entities in the Internet of Things.
Owner:FUDAN UNIV

System and method for correlating user data from a content provider and user data from an advertising provider that is stored on autonomous systems

An autonomous correlation system correlates user data from a content provider and advertising view data from an advertising provider, wherein the user data is present on one autonomous system and the advertising view data is present on another autonomous system distinct from the one autonomous system, the systems being autonomous in that each is normally secured against unconstrained access by another. The autonomous correlation system comprises logic to accept a first message from a user, wherein the first message contains an indication of an object being presented to the user, the object being at least one of a content page and an advertisement, a first user identifier associated with the user by a presenter of the object; a reference database for storing an association between the first user identifier and the user; logic to accept a second message from the user, wherein the second message contains an indication of an object being presented to the user, the object being at least one of a content page and an advertisement, a second user identifier associated with the user by a presenter of the object; wherein the reference database stores an association between the second user identifier and the user.
Owner:PINTEREST

Wireless data system

A system and method for enabling a user to request and receive product information, participate in voting or polling activities, reprint an article or other publication, request and authorize a purchase of a magazine subscription, music sound clip, or other product, and/or share personal information with other users. The service request and information delivery may provided over a mobile phone. The user dials a series of digits into their phone and enters them into the disclosed system, for example by pressing the send key on a mobile phone. The digits entered by the user include a prefix or routing code, and a data code. The dialed digits are transferred to a call switching system, which determines, based on the prefix code, a processing system to which a message is sent including the originally dialed digits as well as identification of the user or phone that placed the call. The processing system may then determine, based on the identification of the mobile phone that placed the call, a user account. The processing system further determines, based on the data code of the dialed digits, the product information or other service such as entry of a polling response, vote, or product purchase, that is to be provided. The user account information may then be used to determine a delivery technique, such as electronic mail using an electronic mail address associated with the phone that made the call, SMS/MMS/EMS Text messaging, or WAP push, through which the product information associated with the data code may be forwarded to the requesting user.
Owner:VHT STARSTAR LLC
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