A blockchain is a distributed ledger with growing lists of records (blocks) that are securely linked together via cryptographic hashes. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data (generally represented as a Merkle tree, where data nodes are represented by leaves). Since each block contains information about the previous block, they effectively form a chain (compare linked list data structure), with each additional block linking to the ones before it. Consequently, blockchain transactions are irreversible in that, once they are recorded, the data in any given block cannot be altered retroactively without altering all subsequent blocks. Blockchains are typically managed by a peer-to-peer (P2P) computer network for use as a public distributed ledger, where nodes collectively adhere to a consensus algorithm protocol to add and validate new transaction blocks. Although blockchain records are not unalterable, since blockchain forks are possible, blockchains may be considered secure by design and exemplify a distributed computing system with high Byzantine fault tolerance....

Blockchain technology has numerous business applications that extend far beyond bitcoin. It can improve contracts, supply chain management and much more.

Bitcoin (abbreviation: BTC or XBT; sign: ₿) is a decentralized digital currency. Bitcoin transactions are verified by network nodes through cryptography and recorded in a public distributed ledger called a blockchain. The cryptocurrency was invented in 2008 by an unknown entity under the name Satoshi Nakamoto. The currency began use in 2009, when its implementation was released as open-source software.: ch. 1  The word "bitcoin" was defined in a white paper published on October 31, 2008. It is a compound of the words bit and coin.The Library of Congress reports that, as of November 2021, nine countries have fully banned bitcoin use, and a further forty-two have implicitly banned it. In contrast, a few governments have used bitcoin in some capacity. For example, El Salvador has adopted Bitcoin as legal tender, although use by merchants remains low. Ukraine has accepted cryptocurrency donations to fund the resistance to the 2022 Russian invasion, and Iran has used bitcoin to bypass political sanctions. Bitcoin has been...

Solvency, in finance or business, is the degree to which the current assets of an individual or entity exceed the current liabilities of that individual or entity. Solvency can also be described as the ability of a corporation to meet its long-term fixed expenses and to accomplish long-term expansion and growth. This is best measured using the net liquid balance (NLB) formula. In this formula, solvency is calculated by adding cash and cash equivalents to short-term investments, then subtracting notes payable. There exist cryptographic schemes for both proofs of liabilities and assets, especially in the blockchain space. See also Accounting liquidity Debt ratio Going concern Insolvency Quick ratioNotes References Gaist, Paul A (2009). Igniting the Power of Community: The Role of CBOs and NGOs in Global Public Health. Springer. ISBN 978-0-387-98156-7. OCLC 310400989....

Cryptocurrency is decentralized digital money that is based on blockchain technology and secured by cryptography. To understand cryptocurrency, one needs to first understand three terminologies – blockchain, decentralization, and cryptography. How Does Cryptocurrency Work? In simple words

Diem (formerly known as Libra) is a permissioned blockchain-based payment system proposed by the American social media company Facebook, Inc. The plan also includes a private currency implemented as a cryptocurrency. The currency and network do not yet exist. The launch was originally planned to be in 2020, but only rudimentary experimental code has been released.The project, currency and transactions are to be managed and cryptographically entrusted to the Diem Association, a membership organization of companies from payment, technology, telecommunication, online marketplace and venture capital, and nonprofits. Before December 2020, the project was called "Libra". History Morgan Beller started working on cryptocurrency and blockchain at Facebook in 2017, and was initially the only person working on Facebook's blockchain initiative.Facebook vice president David A. Marcus moved from Facebook Messenger to a new blockchain division in May 2018. First reports of Facebook planning a cryptocurrency, with Marcus in charge, emerged a few days later. By February 2019, there were more than 50 engineers working...