Methods, systems, and apparatus, including computer programs encoded on computer
storage media, for verifiable-claim issuance. One of the methods includes: receiving, from a …

Methods, systems, and apparatus, including computer pro grams encoded on computer
storage media, for decentral ized-identifier creation. One of the methods includes: receiv ing …

Methods, systems, and apparatus, including computer pro grams encoded on computer
storage media, for claim veri fication. One of the methods includes: receiving, from a first …

Methods, systems, and apparatus, including computer pro grams encoded on computer
storage media, for blockchain based decentralized-identifier authentication, are provided …

An apparatus includes at least one processor configured to determine whether a blockchain
identifies a valid smart contract indicating that communication with a specified node is …

Methods, systems, and apparatus, including computer programs encoded on computer
storage media, for blockchain-based decentralized-identifier creation, are provided. One of …

A computer-implemented method for detecting replay attack comprises: obtaining at least
one candidate transaction for adding to a blockchain; verifying if an identification of the …

A host organization writes a smart contract and an associated plurality of assets to a
distributed ledger via a distributed ledger services interface of the host organization, which …

Techniques are disclosed for decentralized data management using a geographic location-
based consensus protocol in a network of computing resources such as, by way of example …

Methods, systems, and apparatus, including computer programs encoded on computer
storage media, for blockchain-based cross-entity authentication are provided. One of the …