Strategic Business Leader · Enabling success: disruptive technologies

Blockchain, Cryptocurrencies and Smart Contracts for ACCA SBL

Updated 11 October 2026 · Fact-checked

Blockchain is a shared digital ledger copied across many computers. Transactions are grouped into blocks, linked by cryptographic hashes and agreed by consensus, so past records are very hard to alter. In SBL, you explain how it works, apply uses and limits to the case, and advise on risks and governance.

Understand Blockchain, Cryptocurrencies and Smart Contracts

Start with a ledger. A ledger is a record of transactions. Normally one party, such as a bank or registrar, keeps it. You trust that party to keep it accurate. A distributed ledger is a ledger that many participants (nodes) each hold a copy of. There is no single owner.

Blockchain is the best-known type of distributed ledger. New transactions are collected into a block. Each block carries a hash, a unique digital fingerprint of its contents, and the hash of the previous block. This links the blocks into a chain. If someone changes an old block, its hash changes and the chain breaks. The other copies show the mismatch.

New blocks are only added when the network agrees. This is consensus. Examples are proof of work (computers compete to solve a puzzle) and proof of stake (validators put up holdings as a stake). Once added, records are close to immutable. Blockchains can be public (anyone can join, as in Bitcoin) or private/permissioned (only approved participants, which suits most businesses).

A cryptocurrency is one use of blockchain: a digital asset that records value on a ledger and uses cryptography for security. Blockchain is the technology. Cryptocurrency is one application. Many blockchain uses have nothing to do with currency, such as supply chain tracking or recording ownership.

A smart contract is a program stored on a blockchain that runs automatically when set conditions are met. For example, payment is released when a tracked shipment is recorded as delivered. It removes the need for an intermediary and reduces delay and dispute. But the code does what it is written to do. Errors in the code, or poor data fed into it, produce wrong outcomes that are hard to reverse.

For SBL, treat this as a disruptive technology. You must weigh benefits (trust, transparency, speed, lower cost, audit trail) against limits (energy use, scalability, regulation, security of keys, data privacy, volatile crypto values, integration cost). Always tie your points to the case organisation.

Key rules to remember

Blockchain in one line: Transactions → block → hash linked to previous block → consensus → added to every copy of the ledger; Use this sequence to explain how it works in two or three sentences.
Blockchain vs cryptocurrency: Cryptocurrency = one application; blockchain = underlying technology; Never use the two terms as if they mean the same thing.
Smart contract logic: IF condition is met THEN action executes automatically; Self-executing code on a blockchain. It still depends on the accuracy of the code and the input data.
Public vs private blockchain: Public = open to all, permissionless; Private = approved participants, permissioned; Businesses usually prefer private or consortium chains for control and privacy.
Evaluation frame: Benefits − limitations/risks, applied to the case, then a recommendation; Use this balance for any 'advise the board' requirement.

How to solve Blockchain, Cryptocurrencies and Smart Contracts questions

Use this method for any SBL task on blockchain, cryptocurrency or smart contracts.

1Read the requirement and note the verb. 'Explain', 'evaluate', 'advise' and 'recommend' need different depth.
2Define the term briefly in plain words. Show you understand the difference between the ledger, any currency and any smart contract.
3Find case facts that make the technology relevant: trust issues, intermediaries, paperwork, fraud, slow settlement, supply chain traceability.
4State the benefits and link each to a case fact, such as lower cost, speed, transparency or a tamper-resistant audit trail.
5State the limitations and risks and link each to the case: regulation, energy, scalability, privacy, key security, cost of integration, staff skills, partner adoption.
6Add governance, ethics and control points where relevant, such as who controls the network, data protection and the effect on the audit.
7Give a reasoned recommendation, such as pilot first, use a private chain, or do not adopt yet, with conditions.
8Keep the tone professional and write for the audience named in the task, such as the board.

Quickest way: Define, Apply, Balance, Recommend

When to use it: Use this when time is short, for example when the technology is only one part of a larger task.

Define in one sentence: shared ledger, linked blocks, consensus.
Pick two or three case facts that show where it could help.
Give two benefits and two limitations, each tied to those facts.
Close with a one-line recommendation and a condition, such as a pilot.

Common mistakes in Blockchain, Cryptocurrencies and Smart Contracts

Treating blockchain and cryptocurrency as the same thing.
News coverage focuses on Bitcoin, so the two terms blur together.
Fix: Say that blockchain is the technology and cryptocurrency is one application. Then give a non-currency use that fits the case.
Writing a generic list of benefits with no link to the scenario.
Students learn the theory and recite it instead of using the case.
Fix: Tie each point to a named fact in the case. Use phrases such as 'for this company, with many suppliers in different countries...'.
Claiming blockchain is completely secure or that data can never be changed.
Words such as 'immutable' sound absolute.
Fix: Say records are very hard to alter. Mention risks that remain: stolen private keys, coding flaws in smart contracts, and wrong data entered in the first place.
Ignoring limitations such as regulation, energy use, scalability and cost.
The technology is presented as exciting, so students become one-sided.
Fix: Always give a balanced view. Include at least two limitations and say how the company could manage them.
Assuming smart contracts are legally binding contracts without conditions.
The word 'contract' suggests legal status.
Fix: Describe a smart contract as self-executing code. Say that its legal status depends on the jurisdiction and that legal advice is needed.
Giving a recommendation with no professional judgement, such as 'adopt blockchain' without conditions.
Students run short of time and skip the commercial view.
Fix: Recommend a step, such as a pilot on one process, and state criteria: cost, partner buy-in, regulation and control.

Worked examples

Example 1

A global food exporter buys from hundreds of small farms. It has faced customer complaints about product origin and disputes with suppliers over delivery and payment. The CEO asks you to explain how blockchain could help and what concerns the board should have. Write a short briefing.

Show the solution

Define: blockchain is a shared ledger copied across participants. Each record is grouped into a block linked to the previous one, and all parties must agree to add it, so past records are very hard to change.
Apply to origin: farms, transporters and the exporter could each record steps such as harvest, shipment and inspection. Customers could then trace a product to its source, which addresses the complaints.
Apply to disputes: one shared record of delivery means that suppliers and the exporter see the same facts. A smart contract could release payment once delivery is recorded, which cuts delay and argument.
Limitations: the ledger only holds what is entered. Wrong data from a farm is still wrong data. Small farms may lack technology or skills, so adoption could be slow.
Further concerns: integration cost with existing systems, the need for agreed rules on who joins and who controls the network, data privacy, and uncertain regulation in different countries.
Recommend: run a pilot with one product line and a few suppliers, use a private permissioned chain, and review cost, supplier take-up and reduction in complaints before wider rollout.

Answer: Blockchain could give the exporter a shared, hard-to-alter record for traceability and for automatic payments through smart contracts. The board should be aware that data quality, supplier readiness, cost, governance of the network and regulation are limits. Recommend a controlled pilot on a private chain before wider adoption.

Example 2

A board member says: 'Blockchain is just Bitcoin, and it is too risky for us.' Your company is a mid-sized bank that spends heavily on cross-border payments and trade finance paperwork. Respond to the comment.

Show the solution

Correct the misconception: Bitcoin is a cryptocurrency, which is one use of blockchain. Blockchain is the underlying shared ledger technology and can be used for many other purposes without any cryptocurrency.
Explain the relevance: cross-border payments pass through several intermediaries, which adds cost and time. A shared ledger could let parties see one version of a transaction and settle faster.
Explain trade finance: documents such as shipping and payment records could be held on a shared ledger and smart contracts could trigger payment when conditions are met, reducing paperwork and errors.
Accept the risk point where valid: regulation is uncertain, cryptocurrency values can be volatile, systems need strong protection of private keys, and smart contract code may contain errors.
Note the bank-specific issues: money laundering and know-your-customer obligations, customer data privacy, and the need for partner banks to join the same network.
Advise: the risk is real but manageable. Use a private permissioned chain with approved participants, begin with a limited pilot, involve compliance and legal teams, and set success measures such as cost and settlement time.

Answer: The comment confuses the technology with one cryptocurrency. Blockchain may reduce cost and delay in cross-border payments and trade finance, but regulation, security, compliance and partner adoption are genuine risks. The bank should start with a controlled pilot on a private chain, with compliance involved from the start.

Exam tips

Expect blockchain inside a wider case about disruption, strategy or finance transformation. Link it to the organisation's strategy and risks, not just to the technology.
Show professional skills: give a clear, balanced and commercially realistic recommendation in the format asked, such as a briefing or report to the board.
Keep the technical explanation short. Marks usually come from application, evaluation and judgement, not from a long description of hashing.
Mention governance, ethics and control issues where the case allows, such as data privacy, regulation, energy use and who controls the network.
Do not take a one-sided view. A conditional recommendation, such as a pilot with set criteria, usually shows better judgement than a flat yes or no.

Practice questions from Enabling success: disruptive technologies

Blockchain, Cryptocurrencies and Smart Contracts: frequently asked questions

What is the difference between blockchain and cryptocurrency?

Blockchain is the technology: a shared ledger of linked blocks agreed by consensus. A cryptocurrency is a digital asset that uses a blockchain to record who owns what. Blockchain can be used for many things beyond currency.

How does blockchain work in simple terms?

Transactions are grouped into a block. Each block carries a hash linking it to the previous block, forming a chain. The network agrees to add the block, and every participant holds a copy, so changing an old record is very difficult.

What is a smart contract?

A smart contract is code stored on a blockchain that runs automatically when set conditions are met, such as releasing payment on confirmed delivery. It reduces the need for intermediaries. It is only as reliable as its code and the data it receives.

How is blockchain tested in ACCA SBL?

It usually appears as part of a case on disruptive technology, strategy or finance. You are asked to explain it, evaluate its uses and risks for the organisation, and advise the board. Professional skills marks reward balanced, case-based judgement.