The Ultimate Guide to Blockchain – a John Craddock webinar

Presented by international identity guru John Craddock, this webinar is designed for techies who want to get a solid and accurate understanding of Blockchain technology quickly. 

How do Blockchains work? What are their uses beyond supporting the underpinning of cryptocurrency? Why are they key to understanding decentralized identity (DID)? Get beyond the “fake news” about Blockchains by attending John Craddock’s webinar on 30 May.
A webinar presented by John Craddock The Ultimate Guide to Blockchain Thursday 30 May 2019 Register here!

This webinar is the first of two webinars presented by John Craddock

There’s a huge quantity of misinformation about blockchain technology on the internet, and having a solid understanding of blockchains is vital to understanding decentralized identity (DID).

That’s why John Craddock has developed a pair of closely-linked webinars – this one, The Ultimate Guide to Blockchain on Thursday 30 May, and Introduction to Decentralized Identity on Thursday 27 June. As with all John’s sessions, there won’t be any waffle, just great, in-depth technical explanations!

Why attend John Craddock’s Blockchain webinar?

Have your endeavours to understand blockchain been thwarted by a deluge of confusing and contradictory information on the internet? 

In his Ultimate Guide to Blockchain webinar John will cut through the misinformation – “fake news!” – that’s  readily available online, to enable you to get a solid and accurate understanding of blockchain quickly.

You will learn about all the components for creating and managing a blockchain distributed ledger, and how it is becoming a core component of many distributed environments.

There are many different implementations of blockchain and, to aid understanding of the technology, the webinar will focus on the Bitcoin implementation of blockchain.

How Blockchain works

Public blockchains are decentralized distributed ledgers that hold transactions. A transaction moves something from A to B and there are rules that define how a transaction can be executed. As an example, in the Bitcoin network we are moving Bitcoins from A to B and the simplest rule states that we have to prove ownership of A before we can move it to B.

Nodes, transactions, and ledgers

The Bitcoin network consists of multiple nodes (compute engines) which communicate with each other via a peer-to-peer network. It is fully decentralized with no overall central control, each node acts independently following a set of rules. When a transaction is created it is broadcast to the network and validated by each node as it is received. The challenge is that a double-spend can be created by a transaction that moves A to B and another one moving A to C. Some nodes may have the A to B spend and others A to C – which one is correct?

Decentralized transaction ledger

To resolve this issue, we have to add transactions to a decentralized transaction ledger. Nodes can gather a block of transaction together and attempt to added them to the ledger. The very first block of transactions in the ledger is referred to as the genesis block, the next block (2) links to the genesis block, block 3 links to block 2 and before you know it, you have a chain of linked blocks … a blockchain!

Any node can attempt to add a block of transactions to the ledger, but you can only add a block if you solve a cryptographic puzzle. The process of solving the puzzle is referred to as mining, and game theory and probability come into play. It is likely that one node solves the puzzle first and this node’s block gets added to the chain. You are probably thinking: “what happens if two or more nodes solve the puzzle at exactly the same time?” Don’t worry, there is a solution for that!

Let John Craddock take you through his Ultimate Guide to Blockchain. Register for his webinar now!

A webinar presented by John Craddock The Ultimate Guide to Blockchain Thursday 30 May 2019 Register here!

DATE Thursday, 30 May, 2019
TIME 7am Pacific | 3pm UK | 4pm Western Europe
DURATION 60 minutes

About John Craddock

john craddockJohn Craddock is an internationally renowned identity guru and Microsoft ‘Most Valued Professional’ (MVP).

John has been involved in Microsoft solutions since the early days of Windows and Windows NT, and has focused on identity solutions since the first release of AD FS for Windows Server 2003. He’s been involved in numerous IT projects for industry leaders including Microsoft, the UK Government and multi-nationals.  John is a globally-acclaimed speaker who has presented at hundreds of events throughout the world.

Oxford Computer Training is the exclusive host of John’s acclaimed Identity Masterclass and his NEW Auth Protocols Troubleshooting Masterclass in the UK and US.