Blockchains

Blockchain is a digital ledger that records transactions across multiple computers in a secure and transparent way. Each "block" contains a list of transactions and is linked to the previous one, forming a "chain." Because the data is stored across a distributed network, it’s resistant to tampering and fraud. This decentralized structure ensures trust without needing a central authority, making blockchain ideal for secure record-keeping, cryptocurrencies like Bitcoin, and various applications that require transparency and security. It combines cryptography, consensus mechanisms, and open access to create a resilient system for digital data management.