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Private blockchains (or permissioned blockchains) are different from public blockchains, which are available to any node that wishes to download the network. Critics of public blockchains say because everyone can download a blockchain and access the history of transactions, there is not much privacy. [ 9 ]
A private blockchain is permissioned. [55] One cannot join it unless invited by the network administrators. Participant and validator access is restricted.
Hyperledger Fabric is a permissioned blockchain infrastructure, originally contributed by IBM and Digital Asset, providing a modular architecture with a delineation of roles between the nodes in the infrastructure, execution of Smart Contracts (called "chaincode" in Fabric) and configurable consensus and membership services.
The most common form of distributed ledger technology is the blockchain [citation needed] (commonly associated with the bitcoin cryptocurrency), which can either be on a public or private network. Infrastructure for data management is a common barrier to implementing DLT. [4]
Private? [Note 1] Permissioned? [Note 1] Finality Ledger state Notes Refs. Bitcoin: January 3, 2009 Satoshi Nakamoto: BTC. PoW with Nakamoto Consensus Yes (scripts) No No Probabilistic UTXO: First and most well-known blockchain of all; BTC is the most valuable token in terms of market share. [1] [2] Litecoin: Oct 8, 2011 Charlie Lee LTC PoW ...
[19] HB 2417 Act also provides a definition of blockchain technology as a "distributed, decentralized, shared and replicated ledger, which may be public or private, permissioned or permissionless, or driven by tokenized crypto economics or tokenless" [20] and definition of smart contract as "event driven program, with state, that runs on a ...