← Glossary
Blockchain
A shared, tamper-resistant ledger of transactions maintained by many computers.
A blockchain is a digital ledger shared across thousands of computers. Transactions are grouped into blocks and chained together in order, each block cryptographically linked to the one before it.
Because every participant holds a copy and the links can't be altered without redoing all later blocks, the record is extremely hard to tamper with. This is what lets crypto networks operate without a central authority like a bank.