block chain

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The Information Architects of Encyclopaedia Britannica

Last updated

June 22, 2026

Quick Summary

Blockchain is a digital ledger database that records transactions in a sequence of blocks, forming a chain. This technology was first devised in 2009 by Satoshi Nakamoto as the architecture for the cryptocurrency Bitcoin.1

Key features of blockchain technology include:
* Decentralization: It operates without a central authority.2
* Immutability: Once data is recorded, it cannot be altered.2
* Transparency: All participants on the network have access to the same database.2
* Security: Transactions are individually encrypted, and the distributed nature makes tampering extremely difficult.12

Transactions are grouped into blocks, which are then linked chronologically using cryptographic hashes. Each new block contains the hash of the previous one, creating a secure and unchangeable chain. This technology has the potential to revolutionize various industries beyond finance, including supply chain management, healthcare, and voting systems.12

Summary created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.

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…in conveyor belts are commonly block chains, and consist of solid or laminated blocks connected by side plates and pins. The blocks engage with teeth on sprocket wheels. Depending on the material being moved, buckets, hooks, or other devices are connected to the blocks.
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…in conveyor belts are commonly block chains, and consist of solid or laminated blocks connected by side plates and pins. The blocks engage with teeth on sprocket wheels. Depending on the material being moved, buckets, hooks, or other devices are connected to the blocks.
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chain
…in conveyor belts are commonly block chains, which consist of solid or laminated blocks connected by side plates and pins. (See Figure 3.) The blocks engage with teeth on sprocket wheels. Depending on the material being moved, buckets, hooks, or other devices are connected to the blocks.
Read More
…in conveyor belts are commonly block chains, which consist of solid or laminated blocks connected by side plates and pins. (See Figure 3.) The blocks engage with teeth on sprocket wheels. Depending on the material being moved, buckets, hooks, or other devices are connected to the blocks.
Read More