A distributed transaction and data storage platform including a distributed notary ledger or blockchain and one or more individual user micro-identifier chains that together enable the secure effectuation and recordation of one or more transactions, and/or storage of data in an automated, real-time, zero-trust, globally data law and privacy law centric manner while maintaining transaction party confidentiality and preventing chain poisoning.

To address the requirements described above, this document discloses a system and method for performing an action on at least one resource node of a hierarchical organization of resource nodes is disclosed. The system utilizes an external Identity Provider that provide more flexible authentication and authorization services, and leverages such services with secure server such as an on-line data signing service to provide flexible permission management.

A method, a system, an electronic device, and a storage medium for storing and collecting temperature data are disclosed. The storage method includes: acquiring starting time data corresponding to a temperature recording time period and acquiring actual temperature data corresponding to each time stamp; obtaining at least one piece of target compressed data corresponding to the temperature recording time period by compressing the actual temperature data; and storing the starting time data and the target compressed data corresponding to the temperature recording time period into a storage space of a temperature recorder. In the present disclosure, multiple pieces of temperature data may correspond to one piece of compressed data (for example, 1 bit), so that each piece of temperature data only occupies a small storage space, and starting time data and multiple pieces of compressed data are stored in a temperature recorder together, thereby effectively improving the storage performance of the temperature recorder, and achieving rapid collection of the temperature data. The blockchain-based verification for the collected temperature data ensures the security and authenticity of temperature data collection and prevents data from being tampered with.

This disclosure relates to preserving the privacy of users and preventing access to information of other entities. In one aspect, a method includes receiving, from a client device, a content request including request signals specifying user group identifiers that each identify a user group that includes a user of the client device. One or more user group identifiers that satisfy a first k-anonymity process are identified. Selection parameter elements that each include data indicating a respective digital component and a selection parameter for the respective digital component are received from one or more first content platforms. At least a portion of the selection parameters and, for each selection parameter, data identifying the first content platform from which the selection parameter was received are transmitted to a second content platform. Data specifying a given first content platform selected based on the selection parameters is received from the second content platform.

Applications of the privacy switch technology are shown for handling data breaches in database systems, thereby providing fundamental improvements to the security and utility of database technology.

Digital or “smart” contracts execute in a blockchain environment. Any entity (whether public or private) may specify a digital contract via a contract identifier in a blockchain. Because there may be many digital contracts offered as virtual services, the contract identifier uniquely identifies a particular digital contract offered by a virtual machine, vendor or supplier. The blockchain is thus not burdened with the programming code that is required to execute the digital contract. The blockchain need only include or specify the contract identifier (and perhaps one or more contractual parameters), thus greatly simplifying the blockchain and reducing its size (in bytes) and processing requirements.

Technologies are shown for secure management of evaluation data. An evaluation value is received from a source entity. The evaluation value relates to an evaluation entity. Trusted source data secured in one or more data blocks on a first blockchain is searched for an entry corresponding to the source entity. Based on finding the entry corresponding to the source entity in the trusted source data, an evaluation score for the evaluation entity is obtained from the first blockchain or a second blockchain. The evaluation score was previously calculated based on one or more previous evaluation values for the evaluation entity and stored on the first blockchain or the second blockchain. A new evaluation score for the evaluation entity is calculated using the evaluation score and the evaluation value. The new evaluation score for the evaluation entity is securely committed to a new data block on the first blockchain or the second blockchain.

A process for preserving chain of custody for digital evidence captured at a portable device. The portable device transmits a request to upload the digital evidence to the cloud server via an intermediary storage device. The request includes digitally signed evidence metadata with data integrity code and authentication credentials. The portable device receives a response indicating approval to upload the digital evidence to the cloud server via the intermediary storage device. The portable device transmits the digital evidence to the intermediary storage device for uploading to the cloud server, and further transmits a request for approval to delete the digital evidence from the portable device. The portable device deletes the digital evidence only after receiving a response from the cloud server indicating an approval to delete the digital evidence from the portable device.

A service node receives a document creation request sent by a first user for creating a digital document of title of a target asset. The document creation request includes first configuration information of a digital document of title to be created. The first configuration information is generated by the first user by performing a configuration operation on each component in a corresponding first document template based on related information of the target asset. The first document template is a template that matches the related information of the target asset in a plurality of document templates corresponding to a first blockchain. A digital document of title is generated based on the first configuration information and a predetermined document generation rule, and stored in the first blockchain, so the target asset is circulated by using the first blockchain based on the digital document of title.

Described herein is a method for associating information with an asset, comprising the following steps: •acquiring a unique identifying code associated with the asset; •transmitting to a digital platform a request for storing the information about the asset; •through the digital platform, verifying whether storing the information in blockchain requires the consent of at least one authorized participant; •through the digital platform, sending to the at least one authorized participant a request for consent to store the information; •when the consent of the at least one authorized participant is received by the digital platform, through said digital platform storing in the blockchain an information block containing the combination of the information about the asset with the unique identifying code of the asset.