Web3/Blockchain course

To achieve this we do DOUBLE AUTHENTICATION That is, if A wants to send a message to B, A will first encrypt the message using their private key which is inaccessible to the public thus acting as a digital signature The second encryption is done using B’s public key For B to get the readable […]

In this everyone(nodes) will have 2 keys Private key Public key To encrypt and decrypt a message we shall need both the keys i.e.; A wants to send a message to B. Both A and B have private and public keys. So A will ask for B’s Public key and encrypt the message using B’s

If A wants to send a message to B, A first will first need a key i.e. K1 to encrypt the message to a non readable format called a cipher text This non readable format – cipher text- will be received by B and B will need the same key, K1, to decrypt the message

A hash is a unique identifier that distinguishes and identifies a particular txn in the crypto network. It a combination of a set of numbers and alphabets similar to bank txns or even Mpesa txns codes.Hash ID will let you know whether a txn has occurred or not.In this blocks the hash of the previous

Crypt – hidden/ secret Graphy- writing Therefore, Cryptography is the practice of protecting information by transforming it into a secure format This means when sending a message you have to convert it to a way that someone else will not be able to read it but the intended receiver cab read it Peer to peer

•Ledgers– recording of txns that have taken place over a certain period of time •Nodes– different people who maintain the ledgers for transparency and trust in the network •Block– a combination of ledgers that have computed over a certain period of time •Miners– people responsible for maintaining the blocks, confirming txns in the blocks and