One or more embodiments of this application provide a claim settlement method and apparatus employing blockchain technology, which are applied to a blockchain comprising a node device of an insurer and a node device of an insured party, a first smart contract for insurance claim settlement being deployed in the blockchain. The method comprises: acquiring a first transaction for making claim settlement payment to an insured party, wherein the first transaction comprises claim settlement event data corresponding to the insured party; and calling a first smart contract, executing an insurance claim settlement logic declared in the first smart contract and corresponding to the insured party, and performing, on the basis of the claim settlement event data, claim settlement processing with respect to the insured party.

A host system may initiate a multiple node exchange of selected values to generate a random selection. The structure of the exchange may allow later verification that no single node had control of the generation of the random selection. Accordingly, the random selection may be unknown prior to the exchange. The host system may then provide the random selection to the device for integration of the random selection during the capture of video. The video may be recorded to a blockchain. Because of the integration with the random selection, the video may be date verifiable, such that the video can be verified to be created after the random selection and before recordation to the blockchain.

Example methods, apparatuses, and systems are presented that allows a consumer to conduct a purchase backed by a volatile currency that is not recognized by a merchant as a valid form of payment, such as a cryptocurrency. A third-party payment system is configured to issue a secure, reliable token to replace a reserved amount of volatile currency that represents a reliable amount of currency that is recognized by the merchant as a valid form of payment. The third-party payment platform may issue the reliable amount of currency in the reliable token based on one or more risk factors associated with the volatile currency. After purchase, the third-party payment platform may perform a consumer settlement process at a later time, including performing a cryptocurrency blockchain verification process that typically takes at least several minutes and would be impractical to perform at the point of sale.

A system and method of a smart contract and distributed ledger platform with blockchain custody service includes a blockchain service circuit structured to interface with a distributed ledger; a data collection circuit structured to receive data related to items of collateral or data related to environments of the items of collateral; a valuation circuit structured to determine a value for each of the plurality of items of collateral based on a valuation model and the received data; and a smart contract circuit structured to interpret a smart lending contract for a loan, and to modify the smart lending contract by assigning, based on the determined value for each of the items of collateral, at least a portion of the items of collateral as security for the loan such that the determined value of the items of collateral is sufficient to provide security for the loan.

Embodiments provide methods, and systems for facilitating microservices for cryptographic operations. A method includes receiving, by a server system, a cryptographic service request from at least one application of a plurality of applications over a network communication channel. The cryptographic service request comprises a cryptographic operation to be performed and a cryptographic keys index being an identifier of the at least one application. The method includes generating, by the server system, a cryptographic operation command for the cryptographic operation. The method includes sending, by the server system, the cryptographic operation command to a Hardware Security Module (HSM) communicatively connected to the server system to perform the cryptographic operation. The method includes receiving, by the server system, a response from the HSM for the performed cryptographic operation. The method includes sending, by the server system, the response for the performed cryptographic operation to the at least one application.

A method for a protocol in digital asset trading includes step as follow. Trading information is exchanged between the first and the second nodes, in which a first digital currency belonging to the first node and a second digital currency belonging to the second node are expected to be exchanged, and prices of the first and second digital currencies are time-dependent. An atomic swap script and a smart contract are generated. A compensation fee to be paid to the second node by the first node is computed. A redeeming or refunding event is performed in response to the atomic swap script and the smart contract with paying the compensation fee to the second node, in which the compensation fee is dependent on the prices of the first and second digital currencies such that is time-dependent.

Techniques are described for using a decentralized group of authentication server nodes to prevent singular dependence upon any given online platform for authenticating avatars. For each epoch duration of time, a consensus protocol operating on a blockchain is used to elect an authentication server node. The elected node can then act as an authentication server on behalf of the online platform for that fixed epoch duration of time. Within this epoch of time, a client device (e.g., used by a user to access an online platform) performs a periodic heartbeat authentication with the elected authentication server node using an efficient authentication protocol that relies on a keyed-hashing mechanism. A client device can use the described system and authentication methods concurrently with multiple different online platforms (e.g., separate metaverses or other virtual worlds).

Aspects and embodiments are directed to method and system for node based reconciliation. Various aspects also provide for real-time securities exchange while supporting cash based transactions. Additional aspects incorporate improved user interfaces for enabling single selection investment decisions for all of a clients' wealth.

A lightweight node in a decentralized network includes stores a blockchain with a plurality of blocks. The lightweight node adds blocks to the blockchain successively. A given block having a header and a body. The header includes a data merkle root generated as a root hash of a data merkle tree with one or more leaf nodes that are one or more hashes. A given hash being a hash of a combination of (1) a public key associated with a lightweight node of the decentralized network and (2) of a validity value associated with the public key indicating whether the public key is a valid public key. The data merkle root being insufficient for restoring the data merkle tree. But with a public key and an intermediate hash the date merkle root is sufficient for at least partly verifying the public key.

Novel technical ways of analyzing a blockchain system using machine learning are presented, including structures and techniques that can facilitate blockchain address risk assessment via graph analysis. In various embodiments, a system can access a blockchain. The system can build a transaction graph based on analysis of the blockchain. Nodes of the transaction graph can respectively represent blockchain addresses that are recorded in the blockchain. In various cases, edges in the transaction graph can respectively represent blockchain transactions between different ones of the blockchain addresses that are recorded in the blockchain. The system can calculate risk scores respectively corresponding to the blockchain addresses, based on analyzing the transaction graph via at least one machine learning algorithm. These techniques can improve computer operational efficiency by avoiding the execution of unnecessary blockchain transactions.