How Bullet-Proof Is The Blockchain? (Explain Like I’m 5)

Robin Bloor
May 16, 2018 · 5 min read
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The Wall of Worry

Ok, I get that the blockchain is blocks of data cleverly chained together and distributed across lots of servers. However, I’ve heard that hackers are ingenious. Surely they can attack the blockchain in some way?

So how does the blockchain defend itself against DDoS?

DDoS is dullsville anyway; banal, boring and been-there. What else do hackers do to try to subvert your holy blockchain?

Hold on a minute, what do you mean, ledger?

Yeah, and what do you mean by consensus?

Cough, cough: consensus? And btw, we are talking about computers and software. So how has this got anything to do with mining?

Cough, cough, cough: consensus? And btw, why not solve a simple problem, it would all go faster. In fact why not just roll thousands of dice to work out which node won?

I’m not sure I understood that.

Let’s assume I did. How does the winning “mining node” get its reward?

Isn’t CoinBase the name of that big crypto exchange?

No. Errr… so what does “proof of work” mean? I’ve heard the words. Does it have anything to do with mining?

What would happen if two mining nodes came up with the right solution at precisely the same time? Do they both get half?

So, how do the hackers try to subvert the consensus and insert some fraudulent transactions?

You always short-change me. Last time, despite your promise, you never explained why the blockchain was so revolutionary. This time you didn’t explain how bullet-proof the blockchain was. Your headlines are horribly misleading.

Perhaps you need to rebalance your workforce with a pink slip.

Bloor Group

The Bloor Group is a media-savvy technology analysis…

Robin Bloor

Written by

is a technology analyts with a 30 year pedigree. He is also a frequent blogger, a published author and an advisor for Permission.io,

Bloor Group

The Bloor Group is a media-savvy technology analysis business located in Austin Texas. It delivers the goods on corporate IT

Robin Bloor

Written by

is a technology analyts with a 30 year pedigree. He is also a frequent blogger, a published author and an advisor for Permission.io,

Bloor Group

The Bloor Group is a media-savvy technology analysis business located in Austin Texas. It delivers the goods on corporate IT

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