Abstract: In an example method, a distributed transaction network includes a first computing node and a second computing node. The second computing node receives a data record from the first computing node, including an indication of a proposed transaction, an indication of a transaction value associated with the proposed transaction, and an indication of a smart contract associated with the proposed transaction. The second computing node validates the proposed transaction. Upon validating the proposed transaction, the second computing node receives the transaction value from the first computing node, and adds a transaction record to a distributed ledger of the distributed transaction network to indicate receipt of the transaction value from the first computing node.

Abstract: Biometric tokenized networks. In one embodiment, a system includes a network and a server. The server includes a memory storing a biometric token vault, a communication interface, and an electronic processor. The electronic processor is configured to: receive a biometric token (i.e., identity token), a merchant identifier, and transaction details via the network, confirm a uniqueness of the biometric token with a second biometric token stored in the biometric token vault, generate a relationship identifier based on the merchant identifier and a global unique identifier linked to the second biometric token, and determine whether the relationship identifier is associated with a payment account reference, and output the merchant identifier, the transaction details, and a personal account number associated with the payment account reference to an issuer via the network in response to determining that the relationship identifier is associated with the payment account reference.

Abstract: A method and an apparatus for tracing a transaction based on a blockchain are provided. The method may include: invoking a smart contract between an upstream node and an intermediate node; encrypting, by using a private key of the intermediate node, transaction details between the upstream node and the intermediate node to generate and write upstream transaction information into the blockchain; encrypting the private key of the intermediate node by respectively using public keys of the upstream node and an end node, and generating and writing secret-key information of the upstream node and the end node into the blockchain; and decrypting the secret-key information of the upstream node and the end node by using the private keys of the upstream node and the end node, and decrypting the upstream transaction information of the intermediate node by using the private key of the intermediate node to obtain the transaction details.

Abstract: A gateway interfacing with multiple distributed ledger networks may receive, from a buyer on a first distributed ledger network, a request to purchase an asset in exchange for a cash token, the asset being sold by a seller on a second distributed ledger network and an entry on the second distributed ledger network, and the cash token is an entry on the first distributed ledger network; communicate the request to the seller; receive acceptance of the request from the seller; transfer the asset to an electronic wallet for the buyer by updating ownership of the asset on the second distributed ledger network and on the first distributed ledger network; and transfer the cash token to an electronic wallet for the seller by updating ownership of the cash token on the second distributed ledger network and on the first distributed ledger network.

Abstract: An electronic device including a processor that generates first identification data including a unique value corresponding to an external device, transmits an authentication request including information on a blockchain application and the first identification data to the external device, receives, a random value generated from the external device if authentication is successful, transmits a signature request including the random value and information on a transaction to the external device, generates a first hash value for the transaction, receives a second hash value for the transaction, which is generated based on verification of the random value, and signature data obtained by performing digital signature to the transaction with a private key stored in the external device, and determines whether to transmit the transaction to the blockchain network, based on the first hash value and the second hash value.

Abstract: The disclosed computer-implemented method for identifying security threats in smart contract-based services to protect against malicious attacks utilizing off-blockchain resources may include (i) identifying a reference associated with a transaction on a smart contract-based platform, (ii) detecting content describing one or more smart contracts associated with the reference on the platform, (iii) extracting an identifier from the content to locate off-blockchain resources utilized by the smart contracts, (iv) determining potential security threats associated with the off-blockchain resources, and (v) performing a security action that protects against the potential security threats. Various other methods, systems, and computer-readable media are also disclosed.

Abstract: Disclosed is a method and device for preventing blockchain forking. The method includes: selecting s consecutive blocks Bn to Bn+s; generating a key pair for block Bn by a node An that creates the block Bn; holding the node An active in the blockchain's continuously generating blocks Bn+1 to Bn+s until the block Bn+s of s consecutive blocks becomes tamper-proof; in response to that, signing on the block Bn+s with the private key PK?n; in response to the blockchain's subsequently generating a block Bm(m>n+s), placing the signature in Bm; making nodes creating each of the s blocks Bn to Bn+s all execute afore-mentioned steps, thereby forming multiple backlinks associated with the blockchain's block size. The number of backlinks is used for determining blockchain forking by a newly-added node creating a new block.

Abstract: In an approach to CRAI and risk framework for manufacturing applications, a computer-implemented method for causal effect prediction includes identifying, by one or more computer processors, an intervention, where the intervention is selected from the group consisting of threats, failures, corrections, and relevant outputs; collecting, by the one or more computer processors, process dependency data; creating, by the one or more computer processors, an intervention model; combining, by the one or more computer processors, the process dependency data and the intervention model to create a combined process dependency graph; training, by the one or more computer processors, a causal relational artificial intelligence (CRAI) model; and determining, by the one or more computer processors, an estimate of an intervention efficacy.

Abstract: A method is provided including: receiving, by a server from a user device, a cryptogram of a contactless card, wherein the user device receives a payment request message from a merchant device, and the user device receives the cryptogram from a contactless card upon taping the contactless card to the user device by a user prompted by the payment request message; validating and decrypting, by the server, the cryptogram; extracting, by the server, from the decrypted cryptogram a unique customer identifier associated with the user; verifying, by the server, the unique customer identifier; retrieving, by the server from a database, account information of the user; and calling, by the sever, one or more application programming interfaces (APIs) of the merchant device to make a payment in response to the payment request message; and provisioning, by the server, the account information to the merchant device via the APIs.

Abstract: Systems, computer program products, and methods are described herein for implementing and authenticating virtual resource transfer devices comprising electronic data records in a distributed network. The present invention is configured to receive data associated with a virtual resource token owned by a user; determine a resource value of the virtual resource token; generate a virtual resource transfer device associated with the virtual resource token; and generate, based on the resource value of the virtual resource token, a resource transfer availability of the virtual resource transfer device.

Abstract: Techniques for identity resolution and data enrichment include instantiating, at an account of a data consumer, an identity resolution application using an installer stored procedure. A data object is configured, at the account of the data consumer, to share log data generated by the identity resolution application with an account of a data provider. The identity resolution application is enabled, at the account of the data consumer, for an identity resolution process using source data based on an instruction originating from the account of the data provider. The instruction is based on the configuring of the data object.

Abstract: A system for facilitating transactions for real-world items in video games using digital tokens is disclosed. The system is configured to generate a digital token and cryptographically link the digital token to on a blockchain to facilitate transactions for the item using the blockchain. The system includes a video game integration system that serves an electronic advertisement corresponding to the real-world item to a video game that includes a visual indicum of the token; receives a notification indicating that a user has transacted for the real-world item via the video game; and initiates an assignment of the digital token to an account of the user on the blockchain, such that ownership data of the digital token is updated to reflect that the user is an owner of the digital token, such that the user may redeem the token to take possession of the item.

Abstract: The present invention provides an electronic receipt issuing apparatus (10) including an acquisition unit (11) that acquires settlement user identification information that is input to a settlement apparatus and identifies a user of a predetermined settlement service, and settlement information indicating a settlement content in the settlement apparatus, a decision unit (12) that decides whether the settlement user identification information acquired by the acquisition unit (11) is registered in user registration information in which the settlement user identification information is registered in association with electronic receipt service-user identification information that identifies a user of an electronic receipt issuing service, and an issuing unit (13) that issues an electronic receipt, based on the settlement information, when the settlement user identification information acquired by the acquisition unit (11) is registered in the user registration information.

Abstract: Systems and methods that mitigate network congestion on blockchain networks by supporting blockchain operations through off-chain interactions. For example, as communications to initiate off-chain events and/or blockchain operations are received, the system may determine various characteristics about the addresses involved. In particular, the system may determine whether the addresses correspond to cryptography-based, storage applications sharing a common platform service.

Abstract: A tokenization platform for tokenizing consumer products is disclosed. The system includes an item management system that generates a virtual representation of the consumer product based on a set of attributes of a product. The system also includes a token generation system that generates a unique digital token having a set of digital attributes that correspond to the virtual representation and cryptographically links the digital token and an instance of the virtual representation corresponding to a unit of the consumer product. The system also includes a ledger update system that writes the unique digital token to a cryptographic ledger, thereby facilitating transactions for the unique unit of the consumer product using the unique digital token.

Abstract: A system for generating a digital token that uniquely represents a real-world object is disclosed. The system includes a digital token generation system that generates a unique digital token having a set of digital attributes that correspond to a set of real-world object attributes of a real-world object and to generate a cryptographic link between the unique digital token generated by the cryptographic token generation system and a unique identifier for the unique unit of the real-world object, such that the unique digital token provides a unique digital representation of the unique unit of the real-world object. The system also includes a ledger update system configured to write the unique digital token to a blockchain, thereby facilitating transactions for the real-world object using the digital token, wherein the ledger update system updates a side chain of the blockchain with the unique digital token.

Abstract: In embodiments, a tokenization platform that performs risk management functions is disclosed. In embodiments, the system includes a token generation system that generates digital tokens that are cryptographically linked with a virtual representation of an item being offered for sale by a seller. The system also includes a risk management system that determines a risk score associated with the seller and applies a set of conditions to a set of digital tokens that define one or more conditions that must be met to list the item for sale based on the risk score. The system also includes a marketplace system that provides a marketplace interface that allows a user to purchase the item in response to determining that the set of conditions are met by the seller and initiates an assignment of the digital token to an account of the user in response to the user transacting for the item.

Abstract: A device detects a communication involving a user associated with an account and a service representative, and sends, to a user device associated with the account, an authentication notification that causes the user device to display an authentication field for the user. The device sends, to a service representative device associated with the service representative, a message that indicates that the service representative is to request, via the communication, the user to enter personal information associated with the user into the authentication field, where the user device is configured to generate a first authentication code based on a user input received from the user device in the authentication field. The device generates a second authentication code based on personal information associated with the account from a data structure, receives the first authentication code, and performs an action based on the first authentication code and the second authentication code.

Abstract: Techniques for generating and maintaining a student academic ledger are disclosed. In some embodiments, student data is received from a first set of one or more members of a blockchain network. In response, one or more distributed ledgers are updated in the blockchain network. The distributed ledgers are accessible to a student member of the blockchain network using a private key. The blockchain network receives requests from the student member to initiate a transaction with a second set of one or more members that requires access to at least a subset of the student data. Responsive to the request, the second set of one or more members are granted access to at least the subset of the student data from at least one distributed ledger.

Abstract: A system for automated matching between a transaction and a documentation record on behalf of an organization client. The computing server receives, from a third-party server, communication payloads including a documentation record (e.g., a receipt) automatically generated by a third-party named entity acknowledging an occurrence of a particular real-time transaction. The computing server extracts attributes from the documentation record and matches the documentation record to one of the unverified transactions by scoring the attributes extracted from the documentation record against metadata of one of the unverified transactions. If the documentation record matches a transaction, the computing server may then cause a graphical user interface (GUI) to display that one of the transactions was automatically matched with the documentation record.

Abstract: Systems and methods recite the use of a platform service that determines a specific type of data (e.g., a processing metric) based on current network conditions (e.g., current congestion on a blockchain network). The processing metric is then used to account for variations in processing characteristics of a blockchain network occurring while the platform service integrates the on-chain and off-chain interactions. Accordingly, while the platform service performs the integration by triggering an on-chain blockchain operation in response to a communication to initiate an off-chain response, the processing metric accounts for any delays and/or volatility in the network conditions.

Abstract: A method includes acquiring, at a node server, blockchain data for a blockchain address on a blockchain network. The blockchain data includes a plurality of transactions for the blockchain address. The method includes generating a local node trust score for the blockchain address based on the blockchain data. The local node trust score indicates a likelihood that the blockchain address is involved in fraudulent activity. The method includes receiving, from a plurality of remote servers, a plurality of additional local trust scores for the blockchain address. The method includes determining a consensus trust score based on the local node trust score and the plurality of additional local trust scores. Additionally, the method includes receiving a trust request for the blockchain address from a requesting device and sending the consensus trust score for the specified blockchain address to the requesting device.

Abstract: Systems, methods, and computer-readable storage media of template-based digital asset exchanges using a public key cryptography (PKC) framework. One method includes storing a plurality of exchange templates, and receiving a signed exchange request signed by a private key of a public and private key pair associated with a digital asset. The method further includes receiving an environmental dataset, and selecting, utilizing the environmental dataset, an exchange template of the plurality of exchange templates. The method further includes populating the plurality of fields of the selected exchange template based on the environmental dataset. The method further includes providing, to a plurality of user devices, a public key, updating a provider ledger, and updating a central ledger.

Abstract: A system and a method are disclosed for using a client that is unsynchronized with a blockchain network to validate blockchain transactions for IoT devices, web apps, mobile apps, and other applications. The client retrieves a register of nodes (acting as information provider or validator) that are synchronized with the blockchain network, selects a node from the register, and transmits an information request to the selected node. The client receives a response to the request, the response including the requested information and validation indicia (e.g., proofs), and determines whether the response is valid based on the validation indicia. The client transmits, in response to determining that the response is valid, a confirmation to the IoT device, web app, mobile app or other applications.

Abstract: This disclosure describes aspects of an efficient blockchain API communication mechanism that reduces the energy usage and data usage. In some examples, a publish-subscribe mechanism is used for completed transaction receipts for blockchain transactions of a blockchain. The publish-subscribe mechanism uses an open source remote procedure call protocol or hypertext transfer protocol (HTTP). Components of a distributed blockchain application use a single transport or communications protocol for both synchronous and asynchronous communications.

Abstract: An automatic authentication method includes an identification code reading step of reading an identification code assigned to an article from an apparatus side. The method includes a password part generation reproduction step of reproducing a procedure for generating a second password part according to a predetermined random character creation rule based on characters included in an identification information part and a first password part of the read identification code. The method includes a password collation step of collating the second password part generated by the reproduction with a second password part of the identification code of the article read by the identification code reading step. The method includes authentication steps of authenticating the article as a genuine product when the collated second password parts match each other.

Abstract: Methods and systems for omni-chain interoperability protocol in omni-chain network is disclosed. The method includes receiving by a first node, an event data from a first blockchain. The method includes attesting the event data based on a Threshold Signature Schemes (TSS) process. The method includes transmitting the attested event data to time nodes on a timechain. Upon receiving the attested event data, the time nodes validate the attested event data. The validated event data is available for a second node on a second blockchain to access. The second node is configured to access the validated event data from timechain, attest the validated event data along with other nodes on the second blockchain, and deploy a second smart contract on the second blockchain. The second smart contract completes a transmission of the validated event data as an ongoing transaction from the first blockchain to the second blockchain.

Abstract: Some examples described herein relate to generating a non-fungible token on a distributed ledger, where the non-fungible token represents a machine-learning model for use in performing hydrocarbon extraction operations. The non-fungible token can also include one or more identifiers of one or more training datasets used to train the machine-learning model.

Abstract: Systems and methods for securing a cryptocurrency asset transfer via a cross-blockchain bridge. Methods may include detecting a request to transfer the asset between blockchains and extracting a set of features such as smart contract bytecode from event logs associated with the blockchains and a blockchain bridge. Methods may include using a photonic quantum processor to use i) a long short-term neural network and ii) a neural network to generate machine learning models based on the extracted features to output i) a security risk threshold and ii) a security risk percentage, respectively. When the security risk percentage is below the security risk threshold, the method may permit the execution of a smart contract to allow transfer of the cryptocurrency asset over the blockchain bridge. When the security risk percentage is above the security risk threshold, the method may involve blocking an execution of a smart contract on the blockchain bridge.

Abstract: A system described herein may identify a plurality of records recorded to a blockchain, and may identify a particular record of the plurality of records that includes a particular indicator that the particular record is associated with a particular event. The particular indicator may indicate a type of off-chain event. The system may perform, based on identifying the particular record that is associated with the particular event, one or more off-chain actions associated with the particular event. The performed off-chain event may be the indicated type, out of a plurality of possible types of events to perform. The system may record, to the blockchain, an indication that the one or more off-chain actions associated with the particular event have been performed. The event may include an identifier, which the system may also record to the indication that the one or more off-chain actions have been performed.

Abstract: The present disclosure relates to credential management for mobile devices that can be used for access to secured physical environments. One aspect comprises a computer implemented method comprising a server system: receiving, from a mobile computing device, a provisioning request, which includes an account credential; authenticating the provisioning request based on the mobile computing device being linked to an account indicated by the account credential; generating an account token, which is bound to the account credential; generating one or more limited-use credentials (LUCs), using an application sequence counter, each of the one or more LUCs associated with a corresponding application sequence counter value; generating one or more emergency credentials; and transmitting, to the mobile computing device, the account token, the one or more LUCs, the application sequence counter values, and the one or more emergency credentials.

Abstract: A mechanism is provided to review and verify provenance of analytic execution by a contract analytic binding and provenance system. The mechanism is activated to execute a set of analytics for a contract and verifies outcomes of the analytics before writing them to a blockchain network. The mechanism evaluates the provenance data records stored on peer ledgers and establishes transparency of the outcomes by validating consensus between characteristics of the provenance data.

Abstract: Provided is a process that includes: obtaining a fictitious data entry associated with a field present in a plurality of records associated with an online resource; sending a query to a monitoring application, the query specifying the fictitious data entry and a request to determine whether a second repository of compromised data includes the fictitious data entry; in response to the query, receiving query results indicating that the second repository of compromised data includes the fictitious data entry; in response to the received indication that the second repository of compromised data includes the fictitious data entry, identifying at least some of the first set of one or more repositories that store the data entry; designating other data entries within the at least some of the first set of one or more repositories as potentially having been breached; and storing the designation in memory.

Abstract: Exclusive ownership of data units, such as monetary units, is transferred by inputting a request from a transferor, to transfer to a transferee at least a designated one of the data units, said request including an identifier of the transferor, an identifier of the designated data unit, and an identifier of a transferee. The identifier of the transferor is verified and the absence of any other request to transfer the designated data unit is confirmed. A designation of ownership of the designated data unit is then changed from the transferor to the transferee in a ledger, which is comprised of a group of subledgers, each configured as a blockchain.

Abstract: The subject matter disclosed herein provides methods for detecting and mitigating fraudulent transactions conducted over a network. This method can access one or more data values associated with an online transaction between a first party and a second party. The first party can initiate the online transaction. The data values can characterize an identity of the first party and the second party. A score representing a likelihood that the online transaction is fraudulent can be generated. The generation of the score can be based on one or more models for detecting fraud using the data values. The score can be compared to one or more threshold scores. The online transaction can be authorized or rejected based on the comparing. Related apparatus, systems, techniques, and articles are also described.

Abstract: A method for managing personal data is disclosed. A request for an identifier (ID) token corresponding to a user is received from a virtual wallet. The ID token is generated and transmitted to the virtual wallet, where the ID token is presented to a third-party entity by a device of the user. A request for the personal data corresponding to the ID token is received from the third-party entity. A trustworthiness score for the third-party entity is determined based at least in part on an analysis of entity data corresponding to the third-party entity. The trustworthiness score and received request are transmitted to the virtual wallet and passed on to the user device. An indication of acceptance of the request and encrypted personal data associated with the generated ID token are received from the virtual wallet and transmitted to the third-party entity for processing.

Abstract: A data processing method for blockchain technology verifies transactions. Transaction operations on a blockchain are more consistent and the accuracy of transaction data on the blockchain is improved. A first transaction operation corresponding to a first transaction request on the blockchain, and a second transaction operation corresponding to a second transaction request on the blockchain are both performed. When an operation result corresponding to either the first transaction operation and/or the second transaction operation is a failure, then the processing on a transaction operation can be rolled back to a successful operation.

Abstract: Disclosed is a method for use in a virtual asset transmission from a sender having a sending account at a sending virtual asset service provider (sending VASP) to a recipient having a receiving account at a receiving virtual asset service provider (receiving VASP).

Abstract: A uniform resource locator (URL) stored or presented on a tangible, non-transitory medium includes key parameters of an address on a blockchain network from which a token or value is to be transferred. The URL points to computer program code on the blockchain network such that execution of the URL causes the computer program code to produce a cryptographically signed transaction having the key parameters of the address and key parameters of a recipient address on the blockchain network to which the token or value is to be sent, and further causes the computer program code to transfer the token or value from the address to the recipient address. A method generates a URL containing key parameters of an address on the blockchain network that upon execution automatically results in a recipient device that executed the URL receiving control over a token or value stored at the address.

Abstract: A computer-implemented method and system for blockchain network congestion-adaptive handling of events relating to digital assets, including creation and transfer operations. A congestion metric is measured to determine current congestion of the blockchain network. If below a first threshold level, then digital asset request are implemented using blockchain transactions at layer 1 as they are received. If the metric is above the first threshold level, then the received requests are queued until a queue trigger is detected, whereupon the queued requests are processed at layer 2 and a batch blockchain transaction is used to implement the two or more requests by recording the updated state on chain. When the metric falls below a second threshold, the process reverts to using layer 1 blockchain transactions instead of queueing requests for layer 2 batch processing.

Abstract: A system and method for transferring data representing one or more transactions between computing nodes of a computer network by at least one intermediary node may include: receiving a transaction request, for transferring ownership of a product from a current owner to a subsequent owner, the transaction request being signed by the current owner; authenticating the signature of the current owner; accessing a product chain associated with the product; extracting from the product chain a list of target user entities and a contract data element; producing an ownership block including an identification of the subsequent owner; appending the ownership block to the product chain, to indicate transfer of ownership from the current owner to the subsequent owner; and transferring data representing one or more transactions between the intermediary node and one or more computing nodes based on the transaction request.

Abstract: Disclosed are methods, systems, and devices for preventing payments to unintended beneficiaries. A service provider system may receive, from a user device of a user, a payment request to transfer funds from a source account to an identified destination account. A beneficiary system may be identified, and a validation request (e.g., an API call) may be transmitted to the beneficiary system. The service provider system may receive from the beneficiary system a transmission indicating whether the destination account is associated with the recipient identified in the payment request. The user may be alerted if the account number for the destination account is not validated.

Abstract: The disclosed technology relates to blockchain asset transfer destination verification to reduce fraudulent activity and increase confidence in digital asset transfers. An exemplary oracle device may apply a machine learning model to transaction context data received from a source device to generate a confidence score informed based on transaction pattern data for the destination address. The transaction context data may include a destination address and may be associated with a transfer of an asset via a blockchain network. The generated confidence score may then be sent by the oracle device to the source device to facilitate an informed decision by a user of the source device as to whether to proceed with the transaction. The machine learning model may then be updated based on the transaction context data and a completion indication received from the source device and indicative of whether the asset was transferred via the destination address.

Abstract: A system including one or more processors and one or more non-transitory computer-readable media storing computing instructions configured to run on the one or more processors and perform various acts. The acts can include: (a) receiving a payment authorization, through a network, from a sender financial institution; (b) obtaining, in real-time after receiving the payment authorization, a sender status based on sender information of the payment authorization; (c) when the sender status is preauthorized, instructing, through the network and in real-time after obtaining the sender status, a recipient financial institution to bypass a transaction fraud detection mechanism; and (d) instructing, through the network, the recipient financial institution to post a payment amount of the payment authorization to a recipient account in real-time. Other embodiments are described.

Abstract: Method, system, and computer program product for executing cryptocurrency transactions. A request to execute a transaction related to a first cryptocurrency token is received by a secure ledger network. The secure ledger network executes a smart contract validated thereby and determining at least one rule for performing the transaction. Execution of the transaction comprising determining a price of the first cryptocurrency token and/or an amount of at least one of the first cryptocurrency token and another cryptocurrency token obtained in exchange of one another, based on a group of parameters comprising: a total amount (Tt) of the first cryptocurrency token in circulation, a total reserve (Tr) of the other cryptocurrency token in a reserve, and a reserve ratio constant (Rr) predefined as a ratio between the total reserve and a token market cap. A secure ledger maintained by the secure ledger network is updated about completion of the transaction.

Abstract: A medical system, comprising: a medical machine; and a gateway device configured to communicate with the medical machine to allow access to a network, the gateway device comprising a data allowance and limitation unit that is configured to limit communication between the medical machine and the network when the data allowance and limitation unit is in an open state, wherein the data allowance and limitation unit is placed in the open state when a plannable system event occurs, and wherein, while in the open state, the data allowance and limitation unit is placed in a closed state when an unplanned event occurs, thereby providing less limited communication between the medical machine and the network compared to the open state.

Abstract: A computerized network links individual lay users, referred to as “standard users,” with qualified professionals in one or more disciplines, such as law, medicine, engineering, accounting and architecture, who are referred to as “participating professionals.” Business entities, such as corporations, partnerships and limited liability companies, can also participate as “enterprise users,” with linkage through the network to both standard users and participating professionals. The network enables standard users, participating professionals and enterprise users to communicate, share information, conduct studies, and negotiate and/or create documents relating to the professional disciplines.

Abstract: Systems and methods of forensic analysis of cryptocurrency transactions are described herein. A method can include obtaining fiat-based transaction data from a bank account, identifying a purchase of a cryptocurrency from fiat-based transaction data and cryptocurrency exchange trade history data from a cryptocurrency exchange where the cryptocurrency was purchased, obtaining cryptocurrency-based transaction data that identifies downstream cryptocurrency transaction data where the cryptocurrency was transferred out of the cryptocurrency exchange; and scoring a user who purchased or used the cryptocurrency based on the fiat-based transaction data, the cryptocurrency exchange trade history data, and the cryptocurrency-based transaction data.

Abstract: In an example, a non-transitory machine-readable storage medium includes stored instructions. The store instructions, when executed by one or more processors, cause the one or more processors to: receive a unique identifier of a tagged physical good; receive a public key stored in a Non-Fungible Token (NFT) corresponding to the unique identifier; encrypt a first passphrase using the public key to obtain an encrypted passphrase; compare a second passphrase to the first passphrase; and generate an output indication in response to comparing the second passphrase to the first passphrase. The second passphrase is generated by decrypting the encrypted passphrase using a private key stored on an electronic tag device embedded in the tagged physical good.

Abstract: A computer implemented system and a method for providing user related data, such as reputational information, on users of a blockchain involved in transactions is detailed. The method includes an approach for evaluating fulfilment of transactions, particularly in the context of contracts, and then providing a record of that on the blockchain through reputational information. As a result, at a late time, this reputational information can be retrieved. Similar reputational information for other transactions can be retrieved and linked to the same user, for instance based on the use of a hash of the master public key for a user. Aggregate reputational information can be computed from the pieces of reputational information retrieved.