basic

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What is blockchain?

A technology that a

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What is blockchain? week 1

A technology that allows you to store data as blocks - which are connected together by chainlinking : This data : has history, verifiable and immutable - ie., cannot be tampered ; analogy to village accountant who makes not of the transactions in the village and records in central ledger in the town-hall office

What is Web 3.0? A technology where the Internet is also a database and allows peer-Peer networking without need for centralized authority to regulate

What is bitcoin? A blockchain technology that allows peer to peer transactions of cash

What is decentralization ? a system where ere is no need for a regulator ;o ensure decentralization : you need :

architectural decentralization

logical decentralization

??? decentralization

What is a ledger? that records entry of transaction - ex., money from lender to borrower; and an equal entry in borrower from lender;

Modern database have distributed ledgers : multiple copies of ledgers that are synchronized;

issue wit digital ledger is that it can be edited;

blockchain does away with editing : by adding new block to the chain to reflect the transaction;

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Week 2

What is public key cryptgraphy?

analogy is the lock and key :

Say you want to transmit data securely from person A to person B

take the document : person A can use public key of B : and encrypt it;

now the person B , who only has the private key : can unlock it ;

reverse process is not possible : I am not clear here! i need to learn!