Richard Bradley explains what Blockchain is in Deloitte's broadcast series "Technology Decoded" on World Radio Switzerland.
I recently attended an industry seminar where the concept of the Blockchain was explained. At the end of the session, walking out of the lecture room I heard one of the attendees say to a colleague "I'm still not sure what exactly Blockchain is...".
Many of us know that Blockchain is a topic that is hot at the moment. It's a topic that is disruptive. It's a topic that is accelerating.
And that may be your elevator pitch...
Here is our attempt to explain the original intent of the Blockchain in fewer than 100 words.
You (a "node") have a file of transactions on your computer (a "ledger"). Two government accountants (let's call them "miners") have the same file on theirs (so it’s "distributed"). As you make a transaction, your computer sends an e-mail to each accountant to inform them.
Each accountant rushes to be the first to check whether you can afford it (and be paid their salary "Bitcoins"). The first to check and validate hits “REPLY ALL”, attaching their logic for verifying the transaction ("proof of work"). If the other accountant agrees, everyone updates their file…
This concept is enabled by "Blockchain" technology.
Yes - but as a concept, not much more. Complexities come in the implementation and the journey to realise value from such implementations. The above example will, of course, be overly simplistic for some – but may be a starting point for others.
In a traditional environment, trusted third parties act as intermediaries for financial transactions. If you have ever sent money overseas, it will pass through an intermediary (usually a bank). It will usually not be instantaneous (taking up to 3 days) and the intermediary will take a commission for doing this either in the form of exchange rate conversion or other charges.
The original Blockchain is open-source technology which offers an alternative to the traditional intermediary for transfers of the crypto-currency Bitcoin. The intermediary is replaced by the collective verification of the ecosystem offering a huge degree of traceability, security and speed.
In the example above (a "public Blockchain"), there are multiple versions of you as “nodes” on a network acting as executors of transactions and miners simultaneously. Transactions are collected into blocks before being added to the Blockchain. Miners receive a Bitcoin reward based upon the computational time it takes to work out a) whether the transaction is valid and b) what is the correct mathematical key to link to the block of transactions into the correct place in the open ledger. As more transactions are executed, more Bitcoins flow into the virtual money supply. The "reward" miners get will reduces every 4 years until Bitcoin production will eventually cease (although estimates say this won't be until 2140!). Of course, although the original Blockchain was intended to manage Bitcoin, other virtual currencies, such as Ether, can be used.
There are three reasons why you need to know about Blockchain:
We hope that helps in your Blockchain conversations - happy mining!
Imagine a shared computer accessible to anyone, a single source of truth within which to store events, ownership and activities, and to execute workflow involving multiple parties without the use of separate systems and databases - and with no reconciliation required.
It will change the way digital services are provided across all industries globally. Blockchain changes the rules, prepare for disruption or prepare to disrupt.
Find out more about Deloitte's Blockchain practice