The blockchain is a distributed, digital ledger built in a series of encrypted blocks. Each block, transactions recorded and time-stamped to preserve integrity, encrypts or “hashes” every 10 minutes. That record is distributed across countless nodes (computers) worldwide and linked to the blocks before and after it.
Attempts at tampering a transaction record are evident as the entire block would also need to be altered for tampering to remain undetected.
The complexity of this process makes it an excellent deterrent to hackers. In this article, Lantah narrows in on some of these mechanics.