Provided are a power brokerage method and a power brokerage system, and the power brokerage system stores encrypted power brokerage and trading information and a digitally signed hash value in a blockchain distributed ledger through a smart contract code running on a blockchain platform and allows the same to be retrieved. Also, the power brokerage system protects sensitive information related to a brokerage trading contract, a bid, and a settlement by allowing a participant participating in the power market to retrieve original data related to power brokerage and trading information from a power trading server and to compare and verify data forgery/falsification and, at the same time, ensures data integrity and transparency of a brokerage contract and trading.

Systems and related methods facilitating interactions between a merchant device, a central system and a consumer device are discussed herein. Wallet identifying data may be used to secure messages between the consumer device and the merchant device over a wireless link. For example, the merchant device may include circuitry configured to wirelessly receive the wallet identifying data from a consumer device and to transmit the wallet identifying data to the central system. In response, consumer identifying data associated with the wallet identifying data may be received by the merchant device from the central system. In some embodiments, the consumer identifying data may be associated with a unit of location, such as a dine-in location at a restaurant, to facilitate consumer service.

Embodiments of the invention are directed to systems and methods of securely transmitting account credentials, such as a token. A user device and application can initially select an account, and then obtain a transaction identifier associated with the account. The user device can provide the transaction identifier to a resource provider, which can then directly exchange the transaction identifier for the account credentials.

Embodiments of the invention are directed to the utilization of trust tokens to perform secure message transactions between two devices. A trust token transmitted in a message from one device may include first data that is digitally signed by a trust provider computer, and second data that is digitally signed by the device itself. Upon receipt of a message containing a trust token, the recipient may utilize the first data to verify with the trust provider computer that the sender of the message is a trusted party. The trust provider computer may provide the recipient device the public key of the sender. The recipient may utilize the second data and the provided public key to verify that the sender signed the message and that the message is unaltered. These techniques may increase detection of relay, replay, or other man-in-the-middle attacks, decreasing the likelihood that such attacks will be successful.

A method for processing a transaction, wherein the method is implemented by an electronic device for processing transactions, accessible via a communication network. The includes a transaction processing phase. The transaction processing phase: obtaining a contextual cryptographic fingerprint, previously generated during an authentication of a user on a communication terminal; verifying validity of the contextual cryptographic fingerprint in a blockchain including a set of cryptographic fingerprints; and validating a transaction when the verifying the validity of the contextual cryptographic fingerprint in a blockchain is positive.

A client comprising an application for secure payment transactions is provided. The application runs on a personal mobile communication device and the client accesses a service provided by a server, which includes a payment gateway. Various security measures are included in the client-server communication related to executing payment transactions in a secure environment.

A method for a secure check of an electronic ticket, in which the electronic ticket is stored on a first mobile terminal device allocated to an end consumer, and the ticket is checked using a second terminal device allocated to a ticket inspector or to a control system, wherein the method the following steps: sending a request message from the second terminal device to the first terminal device via a first communication channel; sending a response message from the first terminal device to the second terminal device via a second communication channel, the response message being signed by the first terminal device, and the second communication channel; verifying the signed response message by the second terminal device; and confirming the authenticity of the response message by the second terminal device, if the second terminal device was previously able to verify the authenticity of the signature.

Provided is a system and computer-implemented method for encoding account tokens in image files. The method includes receiving, from a user associated with an account identifier, an identification of at least one image, generating at least one token based on the account identifier of the user, encoding the at least one token in the at least one image, resulting in at least one tokenized image, and communicating the at least one tokenized image to a transaction processing system, wherein the transaction processing system is configured to conduct a transaction based on the tokenized image.

Provided are a method and apparatus for blockchain community governance, a device and a storage medium. The method is described below. A community governance transaction request initiated by a blockchain account is acquired. Community governance permission of the blockchain account is verified according to governance token resource information in the blockchain account. In a case where the blockchain account has the community governance permission, the community governance transaction request is executed.

A system is provided as a computer server platform and application programming software installed in primary devices of users for exchanging and trading digital asset securely and anonymously between two users of the system. The digital asset is registered under a device account of a primary device of a user with the system using a unique device account name. The system respects “privacy by design” in GDPR by using device account based-on anonymized data instead of personal account based-on personal data of prior art to ensure the system does not collect, store and process users' personal data in the course of device accounts' set-up and transactions of digital assets.