Techniques are shown for key management using a traceable key block-chain ledger involving creating a cryptographic key at a key source, generating a genesis block for a key block-chain ledger corresponding to the cryptographic key, and securely modifying the genesis block to include metadata describing the key source. The techniques also involve performing a first key transaction with the cryptographic key, generating a first transaction block corresponding to the first key transaction with the cryptographic key and adding the first transaction block to the key block-chain ledger, and securely modifying the first transaction block to include metadata describing the first key transaction with the cryptographic key.

Traceable key block-chain ledger

A messaging balancing and control (B&C) system is disclosed. The system configured to handle message transfers having different message exchange patterns, including: in-only exchange patterns, out-only exchange patterns, in-optional-out exchange patterns, out-optional-in exchange patterns, robust in-only exchange patterns, and robust out-only exchange patterns. The system may write a message transfer confirmation in response to a message transfer between a consumer system and a provider system, with the confirmation including at least a first hash of the message. The system may also write a message acknowledgement to the blockchain with the acknowledgement including at least a second hash of the message. The blockchain may execute a smart contract to compare the first hash of the message to the second hash of the message to identify an out-of-balance message transfer event. A monitoring device of the system may read the out-of-balance message transfer event from the blockchain.

Messaging balancing and control on blockchain

A system for performance testing of scalability implementations and testing of stability in blockchain database implementations. The testing system comprises a cluster of private blockchain nodes instantiated on a network and a control console that allows the user to set the number of nodes in the network and the number of clients for testing of a particular blockchain implementation. Performance metrics are established and tested. The test system allows for staged testing using generated databases, wallets, and accounts starting with simple 5-node networks, expanding to larger networks, then testing with decreased block validation times, continuing to testing using alternative, faster trust schemes, then testing implementation on divided blockchains, and finally testing on shared blockchains.

System and method for performance testing of scalable distributed network transactional databases

A balancing and control (B&C) system for API transactions is disclosed. The system may write a request confirmation and a request acknowledgement to a blockchain in response to an API request being transmitted from a consumer system to a provider system, with the request confirmation and the request acknowledgement each comprising a request hash of the API request. The system may also write a response confirmation and a response acknowledgement to the blockchain in response to an API response being transmitted from the provider system to the consumer system, with the response confirmation and the response acknowledgement each comprising a response hash of the API response. The blockchain may execute a smart contract to compare the request hashes from the request confirmation and the request acknowledgement and the response hashes from the response confirmation and the response acknowledgement to identify one or more out-of-balance events.

API request and response balancing and control on blockchain

Implementations of this specification include traversing a sub-tree of a world-state MPT in multiple iterations, and, at each iteration, for a current node of the sub-tree, executing one of: adding the current node of the world-state MPT to the update tree, adding the current node of the world-state MPT to the update tree, and moving to a next iteration of the traversal setting the current node of the sub-tree to a node referenced by the extension node, adding the current node of the world-state MPT to the update tree, and moving to a next iteration of the traversal setting the current node of the sub-tree to a node pointed to by a slot of the current node of the sub-tree; and transmitting the update tree to a client for updating a locally stored sub-tree using the update tree.

Updating blockchain world state Merkle Patricia Trie subtree

Disclosed herein is a system for providing a cryptographic platform for distributing data structures within a peer-to-peer network wherein encrypted messages are exchanged among nodes. The system provides for the creation and management of privately subspaced blockchains that include subspaces that are private, yet verifiable through the use of global state roots. The global state roots are updated based on subspace roots that are in term generated based on the data in that subspace.

Nadi Sarrar

Papers

Distributed privately subspaced blockchain data structures with secure access restriction management