A banknote includes a security element with a processor and a memory. A private cryptographic key of an asymmetric key pair of the banknote is stored in a protected memory area of the memory. The asymmetric key pair is assigned to a banknote-specific blockchain address in a blockchain. A payment method executed with the banknote includes receiving a payment request for a payment with the banknote in the form of a transaction of an amount to be paid from the blockchain address of the banknote to a blockchain address of a payee, signing a transaction approval with the private cryptographic key of the banknote, and sending the signed transaction approval.

A system includes circuitry for rewriting blockchains in a non-tamper-evident or tamper-evident operation using a key secret held in portions by multiple individually untrusted parties. The blockchains may include a series of blocks secured by integrity codes that may prevent non-tamper-evident rewrites by non-trusted parties that are not in possession of the key secret or individually-untrusted parties in possession of only a portion of the key secret. In some cases, multiple individually-untrusted parties may combine their portions into the key secret. As a group, the multiple individually-untrusted parties may perform non-tamper-evident operation with respect to at least one integrity code within the blockchain.

Provided is a process including: generating a non-fungible token according to a non-fungible token standard; associating a virtual display of a physical object with the non-fungible token; associating object content associated with the physical object with the non-fungible token; and storing the non-fungible token at a first blockchain address of a first blockchain.

In an example, an ecosystem is disclosed that may facilitate digital exchange of a digital asset stored as a computer executable file. The ecosystem may include a plurality of participant systems, wherein the plurality of participant systems may include at least one of an asset user system, an asset holder system, and an asset mining system. The ecosystem may include an asset wrapper associated with the digital asset and configured in the form of a multi-layered structure and computer-executable document. The ecosystem may include a codec configured as a computer executable file and associated with the asset wrapper, wherein the codec may be executed when an external request for the asset exchange is initiated. The ecosystem may include a blockchain device to execute a blockchain smart contract for the asset exchange, wherein the smart contract is executed against a pre-defined number of right tokens characterizing a specific cryptocurrency-value.

A system and method for implementation of transaction security on a distributed ledger-based Mobility-as-a-Service (MaaS) platform is provided. The system includes a message broker device which receives a transaction request associated with a transport service from a publisher node of a transportation provider. The message broker device routes, via an API gateway hosted on the message broker device, the transaction request to a subscriber node of the transportation provider. The API gateway validates the transaction request based on application of a set of security rules on the transaction request. The subscriber node is associated with a first node of a distributed ledger node that stores a first state object. The first state object includes transaction data associated with the transport service. The distributed ledger node receives the validated first transaction request from the API gateway, via the subscriber node and updates the transaction data based on the received transaction request.

Blockchain-enabled crypto asset systems and a Digital Social Recorder system are operable within a computer network environment for allowing a user to control how advertisers access the user's personal data; allowing crypto asset compensation in exchange for social amplification; and tracking asset allocation. Payments made via blockchain tracking, and the distribution of any revenues derived from cost savings provided to terrestrial, satellite or digital radio broadcasters back to music rights holders and other related groups are provided. These rights holders typically like to incentivize consumers, and by using the crypto assets or tokens created by the present invention, a reward for listening/consuming may be provided. Further, payments for industry services to the rights holder are contemplated to include, but not be limited to any Performance Rights Organizations (PROs), Record Labels, Publishing Companies/Administrators, Managers, Agents or any fractional rights holders or owners who would hold claim against any such revenues.

Methods, apparatus and computer software are provided for authorizing an EMV transaction between a user device and a point of sale terminal, particularly, but not exclusively, in situations where a secure element is not made available for the deployment of a payment application on the user device. The payment application is instead deployed to a processing environment that is outside of any secure element on the user device. An ICC Master Key corresponding to the payment application is held by a trusted authority, such as the issuing bank. The trusted authority is adapted generate time-limited session keys on the basis of the ICC Master Key and distribute session keys to the payment application. Receipt of a session key by the payment application enables the payment application to conduct an EMV payment transaction. The session key is used to authorize a single EMV payment transaction.

Methods and arrangements for effecting authentication in a secure transaction. There are defined, on behalf of a user, individuals who are members of a social network of the user. There is received, from the user, a transaction request for a secure transaction. An authentication test is conducted with the user and, upon meeting a predetermined requirement of the authentication test, the transaction request is validated. The authentication test requests the user to confirm at least one information item related to at least one member of the user's social network. Other variants and embodiments are broadly contemplated herein.

A computer system that interfaces with a blockchain is provided. The computer system receives match data for a match between a first data transaction request that is associated with a first identifier and a second data transaction request that is associated with a second identifier. Based on the match data, first and second blockchain transactions are generated. The first blockchain transaction is from a first identifier to an intermediary identifier and the second blockchain transaction is from the intermediary identifier to the second identifier. The first and second blockchain transactions are submitted to the blockchain. A further blockchain transaction is generated and submitted to the blockchain that includes a programmatic structure with a timer condition.

Technique introduced here relates to virtual currency related services, and more specifically, to tools for providing crypto or other digital currency (e.g. bitcoin) related services, including bitcoin DNS service, sending bitcoins over social media communication networks, a bitcoin trading platform and secure storage services for bitcoin.