Full Explanation
Blockchain is a technology that creates a permanent, tamper-proof record of transactions across many computers. Each "block" contains transaction data, and blocks are "chained" together chronologically. This makes blockchain secure and transparent - the data cannot be altered without recomputing all subsequent blocks. Blockchain powers cryptocurrencies and enables instant, borderless transfers without intermediaries.
Frequently Asked Questions
Yes, extremely secure. The distributed nature and cryptography make it very hard to hack.
Once recorded on blockchain, transactions are permanent and cannot be reversed.
Varies by blockchain. Bitcoin: 10 minutes, Ethereum: 15 seconds, Solana: 400ms.
Addresses are pseudonymous but all transactions are publicly visible on the blockchain.