I.2 Cryptographic Hashing
Автор: Professor Carol Alexander
Загружено: 2026-01-17
Просмотров: 13
Video 2 of Lecture 1
The lecture introduces blockchains as a specific class of distributed ledger technology that are designed to record and agree transactions in decentralised networks. It begins by explaining how distributed ledgers differ from traditional centralised databases, focusing on replication, peer-to-peer networking, and the absence of a trusted central authority.
This video covers the role of cryptographic hash functions showing how hashing provides data integrity, tamper resistance, and a compact way to summarise large volumes of information.
In the next video these ideas are brought together through block building, where transactions are grouped into blocks, hashed, time-stamped, and linked cryptographically to form a chain. You learn how the Merke tree structure creates immutability over time, how consensus mechanisms select valid blocks, and why blockchains can function as shared, verifiable records of economic activity without relying on trust in any single institution.
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