Generating self-issued claims anchored by DIDs and using the self-issued claims as self-identification. The computing system generates one or more claims, each of which includes at least information related to (1) a DID, (2) a property of a subject entity who is an owner of the DID, and (3) a value corresponding to the property. For each of the one or more claims, the computing system generates a cryptographic signature by signing the claim with a private key associated with the corresponding DID. The cryptographic signature proves that the claim is a self-issued claim, which is issued by the owner of the corresponding DID and is about the owner of the corresponding DID. A portion of data related to the self-issued claim is then propagated onto a distributed ledger.

A system and method in which one or more probing transactions are performed by transferring respective amounts of a cryptocurrency to one or more cryptocurrency addresses. The system then monitors and ascertains communications traffic exchanged with one or more IP addresses and that at least one of the probing transactions was downloaded to a particular IP address. The system then generates an output that can indicate an association between a cryptocurrency address of interest and the particular IP address.

A blockchain service receives a first request to insert a first value associated with a transaction into a blockchain. In response, the blockchain service calls a commitment service to obtain a commitment based on the first value. The blockchain service then inserts the commitment into the blockchain at a block associated with the transaction. When the blockchain service subsequently receives a second request to confirm whether a second value matches the first value, it can obtain the commitment from the blockchain. This obtained commitment is then passed to the commitment service along with the second value. The blockchain service then receives a confirmation from the commitment service whether the first value matches the second value. The blockchain service can provide a reply to the second request encapsulating the confirmation. Other variations are provided in which residual amount values can be confirmed. Related apparatus, systems, techniques and articles are also described.

An improved blockchain implementation that uses proof-of-transfer to overcome the technical deficiencies of proof of work and proof-of-stake implementations is described herein. For example, the proof-of-transfer process may include elements of a single-leader election sortition, but modified to cause base chain cryptocurrency committed for the purposes of the sortition to be transferred to a burn address or at least one reward address.

CloudChain is a hybrid blockchain which has the features of both a permissioned and permission less blockchain platforms. CloudChain allows anyone in the world to participate (permission less) as miners just like any permission less public blockchains such as bitcoin and ethereum but at the same time it limits or permits (permissioned) what they can do on the blockchain. The primary objective of CloudChain is to provide full decentralization at the same time solve the problems of permission less blockchains such as security, privacy, performance, and scalability. CloudChain's consensus algorithm is a modified PoA algorithm that consists of two methodologies PoW (Proof of Winning) and PoR (Proof of Running) are the basis for rewarding miners for their participation in mining the blocks of the chain.

A computing system can facilitate cross-medium transactions through exchanges without having dependency on exchange computer infrastructure, which when down, can cause open transactions to fail. In response to detecting a downed exchange, the system can execute a failover state to facilitate any transactions initially reliant upon the downed exchange.

A computing system can provide on-demand liquidity for cross-medium transactions using direct wallet-to-wallet transfers of digital currency. The system can acquire exchange rate information from multiple sources and generate a guaranteed exchange rate and trade instructions to the originating and recipient clients to execute the transaction.

An electronic device is provided. The electronic device includes a display, a memory storing instructions, and a processor operatively connected to the display and the memory, and the processor may be configured to execute the instructions so as to further cause the electronic device to if data provided in a predetermined format is recorded in a memory, identify validity of a first block chain address indicated by the data, if the validity of the first block chain address is identified, identify at least one second block chain address capable of performing a transaction with the first block chain address among at least one block chain address of a user of the electronic device, and display, on the display, a user interface including the first block chain address and the at least one second block chain address.

Systems, computer program products, and methods are described herein for a permissioned ledger for real-time resource distribution reconciliation. The present invention is configured to receive, from a computing device of a user, an indication that the user has executed a resource transfer with a resource distribution entity; receive, from a computing device of the resource distribution entity, an artifact associated with the resource transfer; retrieve, from a repository, a distributed ledger associated with the user, wherein the distributed ledger comprises one or more blocks representing one or more artifacts associated with one or more resource distribution entities with whom the user has executed one or more resource transfers; generate a block associated with the resource transfer for the distributed ledger; and update the distributed ledger with the block associated with the resource transfer.

A system includes at least a first computing device, at a financial institution, configured to generate a currency request and apply first-level signature(s) to the currency request. A minting request is generated from the currency request and the first-level signature(s). The system also includes at least a second computing device, at a currency management department, configured to apply second-level signature(s) to the minting request to generate a signed minting request. The system also includes a third computing device, at a director's office, configured to apply third-level signature(s) to the signed minting request. The system also includes a plurality of network nodes, implementing a distributed ledger, configured to verify the first-level signature(s), the second-level signature(s), and the third-level signature(s); and mint the digital currency when the first-level signature(s), the second-level signature(s), and the third-level signature(s) are successfully verified.