A system may include transaction storage devices. Each transaction storage device may include a data store and a registry configured to receive a request to register a universal resource identifier (URI) to a data store with a first secure identifier. The first secure identifier may be generated, using an encoding function and by a user, from a user identifier of the user. The registry may be further configured to store the URI of the data store with the first secure identifier, and receive, from an entity, a request to lookup a data store registered with a second secure identifier. The second secure identifier may be generated by the entity. The registry may be further configured to retrieve the URI of the data store in response to the request to lookup the data store, and transmit, to the entity, the URI of the data store.

A payment processing method involves a server receiving a payee identifier, and linking the payee identifier to a device identifier identifying a payee device. The server receives from a payor device a payment initiation request identifying a specified payment amount and a payor identifier, links a unique token to the specified payment amount and to the payor identifier, and provides the payor device with the token. The token excludes the payor identifier and particulars of the associated payor. The server receives a payment completion request including the payee identifier and the token, and excluding the payment amount, the payor identifier and payor particulars. The server uses the payee identifier to confirm that the payment completion request was signed with the device identifier, uses the payee identifier to locate a payee account, and uses the token to determine the specified payment amount and a payor account associated with the payor identifier.

A node device in a blockchain receives an asset issuance transaction from an asset issuer, where the asset issuance transaction comprises a commitment value and a proof for performing a zero-knowledge proof with respect to the commitment value, and where the commitment value is calculated by inputting at least an asset type of a target asset object issued by the asset issuer to a commitment function. The zero-knowledge proof with respect to the commitment value based on the proof is initiated. It is determined that the asset type of the target asset object is in a set of legal asset types allowed to be issued by the asset issuer. In response to determining that the asset type of the target asset object is in the set of legal asset types allowed to be issued by the asset issuer, the commitment value to the blockchain is issued for storage.

A system and method for establishing a shared session between entities is disclosed. In a method, a first shared session request message being associated with a tag identifier and a first device associated with a first entity is received. The first device is associated with a shared session associated with the tag identifier. A second shared session request message being associated with the tag identifier and a second device associated with a second entity is received. The second device is associated with the shared session. One or both of the first device and the second device having obtained the tag identifier from a tag provided by the first entity or the second entity. The shared session is configured for requesting and providing transaction-related data by and to at least one of the devices associated with the shared session.

A method includes conveying a cryptocurrency transaction to a peer-to-peer network, wherein said cryptocurrency transaction having encoded therein an email address and to convey goods or services embodied in an electronic form to the email address in response to receipt of said cryptocurrency transaction on said peer-to-peer network. The conveying of goods or services includes transmitting over the Internet in conformance with an email protocol. The goods or services includes event admission tickets, music recordings, video, text, game content, live event broadcast, software, encryption keys or passwords.

A personal information management system includes: a blockchain server configured to store a blockchain including, for each block, a transaction and a transaction ID for identifying the transaction; and a personal information management apparatus configured to access the blockchain server, wherein the personal information management apparatus is configured to store a second piece of personal information on an individual, which accompanies a first piece of personal information for identifying the individual, in association with a first transaction ID received from the blockchain server, and wherein the blockchain server is configured to generate the first transaction ID, generate a first block including a first piece of converted data which is based on the first piece of personal information and the first transaction ID, add the first block to the blockchain, and transmit the first transaction ID to the personal information management apparatus.

A system is provided for controlling privacy in an exchange of an asset. The system receives an offer query of an offeror that includes an offeror reveal condition, an asset identifier of the asset, and offeror terms of exchange. The system accesses an offeree reveal condition and offeree terms of exchange for the asset. The system determines whether the offeror reveal condition and the offeree reveal condition are satisfied and determines whether the offeror terms of exchange and the offeree terms of exchange are satisfied. When the offeror reveal condition, the offeree reveal condition, the offeror terms of exchange, and the offeree terms of exchange are satisfied, the system reveals the offeror to the offeree and the offeree to the offeror.

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.

A method of performing a transaction between a first user of a first input device, and a second user of a second input device, the method includes generating, via the first input device, a transaction request with a with a first effort-based identity token associated with first user, receiving a response with the token and a validation key obtained from a validation server via the second input device based on a second effort-based identity token associated with the second user and a second user effort, providing the second user effort and second effort-based identity token to the validation server, receiving a second effort validation key from the validation server, and sending the transaction with the first user and second user identity-based tokens and first and second effort validation keys to the second person to complete the transaction while ensuring both the first and second users are consistent throughout the transaction.

A system and methods are disclosed that enable advertisers, publishers, and consumers to interact to provide well-targeted advertisement impressions, while preserving consumer privacy. Particularly, the system and methods enable accurate and reliable targeting of advertisements without the need for privacy-invasive tracking and collection of consumer information by advertisers or publishers. Instead, the consumer retains complete control of his or her own private information, even while that private information is used for programmatic targeting of advertisements. The system and methods disclosed herein advantageously utilize blockchain as a tool for arbitrating data, which accounts for and helps to eliminate fraud, costly arbitrage, and brand safety concerns by providing the programmatic advertising ecosystem with trust, permanence, transparency, and auditability.