A computer-implemented method includes: determining assets held by a remitter, the assets to be spent in a remittance transaction between the remitter and one or more payees, in which each asset corresponds to a respective asset identifier, a respective asset amount, and a respective asset commitment value; determining a remitter pseudo public key and a remitter pseudo private key; determining a cover party pseudo public key, in which the cover party pseudo public key is obtained based on asset commitment values of assets held by the cover party; and generating a linkable ring signature for the remittance transaction.

Systems and methods for accessing remote digital services by using embedded circuitry included in an electronic device.

Embodiments relate to a smart contract platform that facilitates creation, execution and verification of customized smart contracts. The smart contract platform enables design of customized smart contracts for execution and verification on a distributed ledger network, including smart contracts with logic for querying and fetching sensitive transactional data from participant nodes. A distributed ledger can store tokens indicating successful completion of one or more transaction elements without making some or all the associated transactional data visible. A smart contract form viewer can be used to view and interact with a smart contract form linked to the smart contract. The smart contract form can present contractual provisions in natural language, present transactional data to an authorized user, and accept entry or validation of designated transaction data. As such, the smart contracts described herein provide visibility and verifiability without the lost privacy and lack of customizability that exist with present solutions.

According to an embodiment, a method for automatically providing a cryptocurrency to a recommender using social networking service (SNS) propagation comprises a recommending step in which a blockchain membership node of a member having membership in a proof-of-expansion (PoX) blockchain platform server recommends an identity (ID) of an SNS friend of the member to the PoX blockchain platform server, a registering step in which the PoX blockchain platform server newly registers the ID of the SNS friend as a blockchain membership node, and a reward rate determining step in which the PoX blockchain platform server determines a reward rate for each blockchain member in association with the number of SNS friend IDs that the blockchain member recommends.

An electronic transaction system includes a plurality of administration servers, a terminal, a transaction server. The plurality of administration servers provides an electronic bulletin board. The terminal writes bid data including an encrypted price to the electronic bulletin board. The transaction server gets the written bid data, decrypts the encrypted price, executes transaction using the decrypted price by Zaraba scheme.

Provided herein is a computer-implemented method for provisioning a token to an appliance. The method includes registering an original account identifier to an appliance, wherein the original account identifier is not associated with any user when registered, associating a device token to the original account identifier, wherein the device token is stored by the appliance, associating a user account identifier to at least one of the device token and the original account identifier, receiving, from the appliance, a transaction request for a transaction, the transaction request including the device token, identifying the user account identifier based on the device token, determining that the transaction is authorized based at least partially on the user account identifier and the original account identifier registered to the at least one appliance, and in response to determining that the transaction is authorized, processing the transaction. A system and appliance are also disclosed.

A provider device provides an app to a user device, creates a first user-specific signature that incorporates user information and a first incremented value, and stores the first user-specific signature in a user-specific registry. The app receives request information, adds an app-sequenced incremented value to the request information to produce request data, and sends the request data to the provider device. The provider device calculates an expected incremented value. The provider device determines the validity of the request data by comparing at least the app-sequenced incremented value with the expected incremented value and processes the request information if the request data is valid. The provider device then creates an incremented user-specific signature that incorporates the user information and the app-sequenced incremented value and adds the incremented user-specific signature to the user-specific registry.

Techniques and apparatus for providing peer-based management of user accounts are described. In one embodiment, for example, an apparatus may include at least one memory and logic coupled to the at least one memory. The logic may be configured to determine a total entity risk value representing a risk position of an entity comprising at least one segment, generate a plurality of risk tokens, each of the plurality of risk tokens having a token value that is a portion of the total risk value, determine a total segment risk value for the at least one segment, the total segment risk value representing a portion of the total entity risk value allocated to the at least one segment, and distribute the plurality of risk tokens to the at least one segment of the entity to correspond with the total segment risk value. Other embodiments are described.

A payment method and a payment system are disclosed. After a biological body enters a predetermined range of a payee device, a communication connection is established by a payee device with a payer device through the biological body, and transaction information is transmitted to the payer device. The transaction information is received by the payer device, key information is extracted and is prompted, and authentication information is transmitted to the payee device after receiving a confirmation instruction. The authentication information is received by the payee device and biological feature information about the biological body is acquired during a time duration when the biological body is within the predetermined range. An authentication result for authenticating the digital authentication information and the biological feature information is acquired by the payee device, and payment transaction is performed when the authentication result is a successful authentication.

A method for creating an asset-backed distributed ledger token representing a smart contract, the token being backed by a pledge of an illiquid form of a precursor or means of production of a commodity asset, comprising receiving a pledge of unrefined or pre-commodity asset, digitizing the unrefined commodity asset into fractional representations of the commodity asset using smart contracts on a distributed ledger network, and allowing account holders access to the perform transactions on the distributed ledger network to trade the fractional representations under the terms of the smart contract.