The blockchain definition includes a decentralized digital ledger that records transactions across a computer network, ensuring every transaction is secure, transparent, and immutable. Key features include:
Decentralization: Eliminates the need for a central authority, enhancing security and transparency.
Immutability: Transactions cannot be altered once validated.
Transparency and security: Within the blockchain, all participants can view transactions, secured by cryptographic hashing and consensus mechanisms like Proof of Work or Proof of Stake.
Smart contracts: Self-executing contracts that automate the terms of an agreement.

In supply chains, blockchain enhances traceability and reduces fraud.
While the technology behind the blockchain definition offers many benefits, its implementation can be complex and energy-intensive, especially in networks using proof-of-work. Moreover, practical applications can vary significantly based on specific technological and regulatory contexts.