dido:public:ra:xapend:xapend.a_glossary:b:blockchain
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dido:public:ra:xapend:xapend.a_glossary:b:blockchain [2021/07/23 17:07] murphy created |
dido:public:ra:xapend:xapend.a_glossary:b:blockchain [2021/10/04 13:40] (current) 50.19.247.197 ↷ Links adapted because of a move operation |
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| ===== Blockchain ===== | ===== Blockchain ===== | ||
| - | [[dido:public:ra:xapend:xapend.a_glossary| Return to Glossary ]] | + | [[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]] |
| - | **Blockchain** is a type of distributed ledger, comprised of unchangable, digitally recorded data in packages called blocks (rather like collating them on to a single sheet of paper). Each block is then ‘chained’ to the next block, using a cryptographic signature. This allows block chains to be used like a ledger, which can be shared and accessed by anyone with the appropriate permissions. | + | **Blockchain** is a record-keeping technology designed to make it impossible to hack the system or forge the data stored on it, thereby making it secure and [[dido:public:ra:xapend:xapend.a_glossary:i:immutable|immutable]]. |
| - | Source: [[https://hackernoon.com/blockchain-dictionary-f4d098c9ef89]] | + | It is a type of [[dido:public:ra:xapend:xapend.a_glossary:d:dlt]], a digital system for recording transactions and related data in multiple places at the same time. Each computer in a [[dido:public:ra:xapend:xapend.a_glossary:b:blockchain_network|blockchain network]] maintains a copy of the [[dido:public:ra:xapend:xapend.a_glossary:d:distributed_ledgers|ledger]] to prevent a single point of failure, and all copies are updated and validated simultaneously. |
| + | Blockchain is also considered a type of database but differs substantially from conventional [[dido:public:ra:xapend:xapend.a_glossary:d:dbms]] or [[dido:public:ra:xapend:xapend.a_glossary:r:rdbms]] in how it stores and manages information. Instead of storing data in rows, columns, tables, and files as traditional databases do, blockchain stores data in blocks that are digitally chained together. In addition, a blockchain is a decentralized database managed by computers belonging to a [[dido:public:ra:xapend:xapend.a_glossary:p:p2p]] [[dido:public:ra:1.2_views:3_taxonomic:1_topologies:3_distributed | Distributed ]] topology instead of a [[dido:public:ra:1.2_views:3_taxonomic:1_topologies:1_centralized | Centralized ]] or [[dido:public:ra:1.2_views:3_taxonomic:1_topologies:2_decentralized | Decentralized ]] topology like in traditional databases. | ||
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| + | The [[dido:public:ra:xapend:xapend.a_glossary:c:cryptocurrency|cryptocurrency]] Bitcoin, launched in 2009, was the first popular [[dido:public:ra:xapend:xapend.a_glossary:a:application|application]] to successfully use blockchain. As a result, blockchain has been most often associated with Bitcoin and alternatives such as Dogecoin and Bitcoin Cash. | ||
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| + | Source: [[https://searchcio.techtarget.com/definition/blockchain]] | ||
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dido/public/ra/xapend/xapend.a_glossary/b/blockchain.1627074454.txt.gz · Last modified: 2021/07/23 17:07 by murphy
