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Will blockchain replace core banking?

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I've got lots more to write about digital transformation and the things I'm learning from banks engaged in doing it but, to give you a break, I also have a couple of fantastic guest submissions which are worth sharing.

Today's share is from Simon Taylor, he of the blockchain fame from 11FS. Simon recently wrote about his expectations for blockchain this year. Here's his view ...

Will blockchain replace core banking?

None of the challenger banks use blockchain, the guy who’s leading the most popular smart contract platform (Ethereum) say’s it’s a bad idea. So, I mean read on…but no, don’t use a blockchain or smart contracts for the love of god.

In the past week I've had several people ask me questions like "Will blockchain replace core banking?" or "Is blockchain the future of core banking?" There's a very simple answer in my mind. Not in the foreseeable future. A Blockchain makes sense as a golden source of data between banks, that over time could replace a banks internal systems, but the timeline for that is extremely long. Be wary of anyone suggesting your core system should use blockchain in any shape or fashion. Why? Read on...

Firstly, my story (skip this bit if we're already besties)

I was head of Blockchain R&D at Barclays, after having worked in Payments change, as well as payments generally for a decade. The CTO appointed me to the role after having waved my arms to get attention for what I saw as a transformative technology (in the long term).

Within 2 years, we'd completed 40x PoCs, 4 pilots, were the first bank to invest in R3, became the first bank in the world to move real value over a blockchain (£100k in 2016) and the first tier 1 bank in Europe to offer bank accounts to companies active in crypto (2016).

I then went on to advise the UK Government Office Science on crypto. Worked with G20 central banks and regulators, and continue to do so through a not for profit members association called Global Digital Finance.

In short, when I talk on banking and blockchain, I'm not some random research house spewing surveys and charts at you. This is hard-won experience.

What’s blockchain got to do (got to do) with it?

Blockchain has been a heavily hyped technology since 2015, with global banks completing POCs and pilots and competing for headlines. It is important to separate “cryptoassets”, which are a new way of representing value, from “Distributed Ledger Technology” (or DLT).

Blockchains don’t help one bank maintain a clear view of its relationships with its customers nearly as efficiently as a centralised database would

Cryptoassets made headlines through 2017 after a significant market bull run caused prices to inflate. Whilst this was largely driven by speculation, for the first-time assets were traded 24/7 on global platforms not tied to any one jurisdiction. The short-term impact of this to banks (outside of wealth management) is limited, however, in the medium term, the concept of representing an asset as a “token” instead of a balance on a ledger is one that may be disruptive to global financial markets. Global financial markets are now considering how “securities tokens”, or regulated tokens could enable truly digital, end to end offerings of equities, bonds and many other asset classes.

But that’s all markets stuff...

Yes, yes it is.

Neither crypto nor DLT removes the need for a core banking capability. However, to take advantage of crypto or DLT, a modern core is essential. Integration to legacy will reduce benefits to almost 0.

You still need a core banking platform, but using a blockchain or DLT is probably a bad idea. Blockchains work because they are slower than centralised technologies. They help many mutually distrusting actors agree on a set of facts. Blockchains don’t help one bank maintain a clear view of it’s relationships with its customers nearly as efficiently as a centralised database would.

That doesn’t mean blockchain is bad

DLT solves the fundamental problem of reconciliation in banking i.e. “I need to know what I see is what you see” (and that remains true and hasn’t changed since we agreed it).

Today banks often have to manually reconcile accounts because despite many standards existing, there is a high error rate. Many of the systems used by banks were built decades ago by people no longer working for the bank and those systems have become increasingly complex.

DLT has the potential to change this across a number of assets in 3 to 5 year time frame. If the core systems themselves are up to the task.

But what about smart contracts?

“Smart Contract” is a heavily loaded term. It sounds like the stuff of dreams a legal contract that runs in code. The reality is very different.

The term originates from Nick Szabo and gained popularity in 2013 when Ethereum went public as a project. As implemented, they are neither smart nor contracts. As others have observed a better term would be “dumb scripts”. The nuance is that these bits of computer code tend to run in many places at once vs today where computer code tends to run on a server (e.g. at Facebook, or at Google) or client side (your device). In “smart contracts” on a blockchain that code runs the same way in many places.

Why’s that important? Well, it was designed to mean code would be unstoppable, code could run without any centralised actor. Many of the decisions made in the development of tools to build smart contracts for Ethereum don’t make sense for a core banking system. That’s not the problem they were trying to solve.

Programmable and modular architectures good

Stepping back for a second to core banking. If we ignore the issue of banks communicating with each other there are plenty of issues inside the walls of the core banking system.

Most core banking solutions are built on 20 to 40 year old architectures and have been “lifted” into the cloud. More pressing is that many of the assumptions about what a core banking system is and does haven’t been challenged. These systems were built to digitise a paper process. A paper process that worked when we had branches and regional headquarters.

In the age of digital a paper process usually isn’t optimal. So it stands to reason that you need to go back to first principles.

Months to configure a product doesn’t cut it

Challengers have entered the market that can deploy live to production 100 times per day and can build products around their user. This mass customisation is critical to compete in the future. It stands to reason then, that new technology like “blockchain” will catch the eye of anyone trying to future-proof their offering to customers.

Except, none of the challengers use this. I interviewed the founder and creator of Ethereum on a recent blockchain insider episode, he talked freely about how “upgrades in cryptography” are the short-term benefits of blockchain(s). Product configuration and core banking, not so much…

What should you look for in a core banking system?

A simple list:

  1. Core banking that upgrades itself. Why when every bank in a region has the same compliance requirements do they all need to spend 75%+ of tech investment on mandatory/regulatory?
  2. A modular architecture that is digital all the way down. This means everything from the ledger itself can be changed, replaced and upgraded.
  3. Rethinking the nature of processes. It’s not enough to make banking as it used to exist go faster, it’s time to rethink the processes and work with teams who have a proven track record.
  4. Something you don’t have to do all at once. We’ve all see the horror stories in the news of “big bang” migrations gone wrong. How do you start small but win big and can the platform support doing that for you?

Does it exist?

We think so, head on over to 11:FS Foundry to see what that simple list can do.

Chris Skinner Author Avatar

Chris M Skinner

Chris Skinner is best known as an independent commentator on the financial markets through his blog,, as author of the bestselling book Digital Bank, and Chair of the European networking forum the Financial Services Club. He has been voted one of the most influential people in banking by The Financial Brand (as well as one of the best blogs), a FinTech Titan (Next Bank), one of the Fintech Leaders you need to follow (City AM, Deluxe and Jax Finance), as well as one of the Top 40 most influential people in financial technology by the Wall Street Journal's Financial News. To learn more click here...

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