A computer implemented method of access control for a restricted resource of a resource provider in a network connected computer system, wherein a blockchain data structure accessible via the network stores digitally signed records validated by network connected miner software components, the method comprising: identifying an access control role definition for access to the resource, the role including a specification of access permissions; defining a cryptocurrency for indicating authorisation to access the resource, the cryptocurrency being formed of tradeable units of value associated with records in the blockchain and wherein transfer of the cryptocurrency between records in the blockchain is validated by the miners; receiving a request from an authenticated resource consumer for authorisation to access the resource; and submitting a blockchain transaction to the miner components to transfer a quantity of cryptocurrency to a consumer record in the blockchain, the transaction including an identification of the role, such that the consumer record identifies that the consumer is authorised to access the resource in accordance with the role definition.

Examples herein involve authorization of use of cryptographic keys based on cryptocurrency payments. An example method includes analyzing a request for a cryptographic key of a key server where the request may be received from a requesting device and the cryptographic key is used to decrypt or encrypt a message of the request, and authorizing use of the cryptographic key to decrypt or encrypt the message based on a balance in a cryptocurrency wallet associated with the request.

Described herein is a system in which temporary aliases may be associated with, and maintained with respect to, cryptocurrency addresses. In some embodiments, the system enables a temporary alias to be used by a mobile application (e.g., a wallet application) in a cryptocurrency transaction. In some embodiments, temporary aliases may be assigned from a pool of procedurally-generated aliases. In some embodiments, the temporary alias may be valid for a predetermined amount of time or number of transactions. For example, the system may assign a new temporary alias to a cryptocurrency address for each transaction and/or after a predetermined amount of time has elapsed.

Distributed crypto currency reputation systems and methods include monitoring a crypto currency public ledger. A current crypto currency transaction is detected in the crypto currency public ledger and, in response, reputation markers may be allocated to both a payer and a payee that are involved in the current crypto currency transaction. At least some of the reputation markers are then determined to have been transferred from the payer to the payee and from the payee to the payer. When a request for reputation information for the payee or the payer is received, information associated with the transfer of the at least some of the reputation markers from the payer to the payee or from the payee to the payer may then be provided.

A computer-implemented process, system, and computer readable medium are provided for administration and governance of fiat and cryptocurrency funds in a distributed computer system. In one example, a process includes, at an electronic device with one or more processors and memory, accessing a list of a plurality of participant nodes, which may include a fund administrator receiving a list of participants or nodes. The method further includes transferring crypto-currency (e.g., that is pegged to U.S. dollars, local currency, or the like) to one or more of the participant nodes. Each of the participant nodes may include an interface portal (e.g., a web-portal) for viewing transferred crypto-currency and for transacting (e.g., bidding, soliciting, etc.) with other participant nodes of the list of participant nodes with the crypto-currency.

The invention relates to a system for trading, a method of trading using the system, and a device used for trading with the system. The system comprises a network including at least one computing device and network nodes, a digital ledger which establishes the order and state of crypto-currency transactions, crypto-currency market orders and/or crypto-currency market trades, and maintains a record thereof. The digital ledger is connected to the network. The digital ledger is configured to enable a user to transfer data on the network, the data being associated with a crypto-currency, and a value of the crypto-currency correlating to a value of an asset held by an asset holder. The digital ledger is further configured to enable consensus, relating to the data recordable on the digital ledger. A trading platform is generated using the system, which enables the user to transact, store, and/or trade a value of the asset using the digital ledger to change the permission rights of the crypto-currency, such that the trading occurs in a contract-free manner.

A payment processor receives currency information and identification information. The currency information comprising a payer fiat-currency and a payee fiat-currency and the identification information comprises information verifying the identify of a payer and a payee. The payment processor utilizes the currency information and the identification information to determine a transaction restriction level and verifies that the identification information meets the threshold for the transaction restriction level. The payment processor receives payment in the payer fiat-currency and initiates a transaction to convert the payer fiat-currency amount into a crypto-currency amount. The payment processor converts the crypto-currency amount into the payee fiat-currency. The payment processor initiates a transfer of the payee fiat-currency amount to the payee.

The disclosure relates to a blockchain-implemented system and method of controlling the transmission and/or distribution of digital content. In an illustrative embodiment, the blockchain is the Bitcoin blockchain. The first user (5) is associated with a deposit quantity of cryptocurrency at a common address (23), wherein to spend from the common address requires signatures of both a first private key of the first user (5) and a second private key of the second user (7). The system (1) comprises a first node (15) and a second node (17).- The first node (15) is associated with a first user (5) comprising a first processing device configured to: (A) send, over a communications network (8), a request to the second node (17) to provide an episode of digital content from a series of digital content; (B) determine a payment transaction (27) to transfer from a common address (23) a payment quantity of cryptocurrency to the second user (7), wherein the payment quantity of cryptocurrency is based on a quantity of episodes of digital content in the series of digital content requested by the first user (5); and (C) sign, with the first private key (V ), the payment transaction (27) and subsequently send the payment transaction (27) to the second node (17). The second node (17) is associated with the second user (7) comprising a second processing device configured to: (I) receive, over the communications network (8), the request from the first node (15) to provide the episode of digital content and the payment transaction (27), signed with the first private key; (II) verify the payment transaction, comprising verifying that the payment transaction includes the payment quantity of cryptocurrency to the second user (7), and based on the result of verifying the second processing device is further configured to: (III) provide access, over the communications network (8), to the episode of digital content (i) to be available to the first node (15); and (IV) co-sign, with the second private key of the second user (5), the payment transaction and send the co-signed payment transaction to a distributed ledger (blockchain) (9).