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WannaCry, Ransomware and Bitcoin


The recent "WannaCry" ransomware attack that hit the NHS (and more than 200,000 other victims across 150 countries) has focused attention on the CryptoCurrency called Bitcoin.

There have been numerous calls to outlaw Bitcoin and other CryptoCurrencies but there's a lot of misunderstanding, and a mistaken belief that they are only used to fund criminal activities.

Bitcoin, Crypto Virtual Currency

Articles in the mainstream media about Bitcoin have focused on its use by criminals, whether for the payment of ransom demands, or "laundering" normal money, or direct trading in illegal weapons and drugs on the "Dark Web."

"The Silk Road", for example was one notorious dark web site, using bitcoin to trade in drugs, weapons and other illegal services in a similar but secret way to normal on-line shopping. It was taken down by the FBI in 2014. But Bitcoin and other digital currencies were always intended for normal, legitimate purposes, and they are now experiencing a significant uplift in their (legal) use.


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What is a digital/virtual currency?

A virtual currency is simply a digital form of money for online transactions. Virtual currencies only exist electronically, there's no bank notes or coins and no bank deposits, hence their description as a virtual currency.

Virtual currencies bring innovation and benefits to more traditional forms of banking and financial systems. Transactions are much cheaper and faster with international payments being much simplified due to freedom from exchange rate worries and bank transfer fees.

This means there are no currency exchange barriers, digital currencies are genuinely international, unaffected by national boundaries and traditional currency issues and associated exchange rate issues - until you want to exchange them for traditional cash. The most well known virtual currency is Bitcoin although other examples include Dogecoin, Ether, Dash, Litecoin and Stellar.

In the early days, virtual currencies were seen as a way to pay for online transactions but these days you can use them as a form of payment in physical stores. There are even Bitcoin ATMs where you can buy and sell Bitcoins from your account - there are 20 in London alone and a total of 60 across the UK.

What is a Bitcoin

Bitcoin was one of the earliest and probably the most well known virtual currency, introduced in 2008. In 2013 Bloomberg effectively endorsed the legitimacy of Bitcoin by testing it on its trading terminals; later that year the US Federal Reserve gave their apparent blessing, stating that Bitcoin "may hold long-term promise, particularly if the innovations promote a faster, more secure and more efficient payment system".

In 2014 our own HMRC classified Bitcoin as assets or private money, which meant that no VAT is presently charged on the mining of, or exchange of Bitcoin. Later that year, Microsoft started accepting payment by Bitcoin and a 2015 HMRC report on digital currencies further marked the acceptance of virtual currencies by mainstream financial services.

What is a Blockchain

Bitcoin's Blockchain is a database that records all of its transactions. It's a distributed database, meaning it's split up into small parts that can each be held in different places, it is is totally separate from the banking industry and free from central interference.

Transactions are recorded in the form "payer X sends Y bitcoins to payee Z". Once payments are validated they are added permanently to the Blockchain.

How do I get digital money


Believe it or not, it's possible to make your own, legitimate, Bitcoins through a technique called "mining" which uses high performance computers to carry out sophisticated cryptological processing (solving huge mathematical puzzles) which effectively makes new currency: this is then added to the Blockchain. Mining is not as easy at it sounds, however, so most people simply buy their Bitcoins, and other virtual currencies, through more traditional routes - swapping ordinary money for them, for example, in the Bitcoin ATMs mentioned earlier.

How can I spend digital money

You can use Bitcoins to purchase traditional currencies, products and services and you can acquire Bitcoins in a similar manner.

Small fractions of a Bitcoin can be used, too. The sub-units are the millibitcoin (0.001 bitcoin), microbitcoin (0.0000001 bitcoin) and the Satoshi, which is the smallest amount and named after the inventor (0.00000001 bitcoin). Together these units make the bitcoin system practical for even small transactions.

As noted earlier, transactions follow a "payer X sends Y bitcoins to payee Z" format. Although transactions on the Blockchain are open to inspection, the reason why Bitcoin is so attractive to criminals is that transactions are pseudonymous. This means that "payer X" is only identified by his or her Bitcoin address.

In 2014, Bitcoin Payment Service Provider (A PayPal for Bitcoin) started accepting Bitcoin payments for tickets and concession sales at the St. Petersburg Bowl in the USA and in 2015 Barclays started to accept Bitcoin, the first UK high street bank to do so. Over 100,000 establishments were accepting payment by Bitcoin by the end of 2015.

Online retailers accept Bitcoin

You can buy technology from Aria and Dell, pre-owned technology, media and games from CeX around the UK, you can sign up for language courses, buy a beer and a meal in a pub, book theatre tickets, accommodation, home and garden furniture, new windows and much more. There's a full list of UK companies accepting Bitcoin here.

In 2013 a Bitcoin was worth $13 and at the time of writing a Bitcoin would cost $1,033.43 (£830.81) having peaked in 2017 at $1216.73.

The downside is the lack of protection because virtual currencies lie outside of the established banking regulations, Bitcoin users are not protected by refund rights or chargebacks and transactions are non-reversible.

Where do I keep my Bitcoin?

Your "digital wallet" stores all the information required to transact bitcoins. Although they're frequently described as a place to hold, or store your Bitcoins, the reality is that Bitcoins ONLY exist in the Blockchain and your digital wallet simply stores your credentials to access your Bitcoin holdings. It's similar to the way your debit card doesn't store your money but allows you to access your account and arrange for the transfer for funds from your account to that of the seller.

How safe/secure is my digital money bank

Because your virtual currency is held centrally, there's actually nothing to steal, in the conventional sense.

However, your wallet needs to be secured. You need to use a strong password - and don't forget it because there's no "password recovery" routine. Lose your password and you lose your Bitcoin. You should keep your wallet backed up, preferably in a number of locations: online, USB, etc., just as you would for your other computer data.

So, is traditional money dead?

Far from it! This is simply because each country likes to have its own currency in place and because of the fear associated with the disruption that virtual currencies will cause.

As a result, banks have tried to make it easier for customers to spend their traditional money. We saw the introduction of cheques—now on the decline—credit and payment cards that facilitate the easy transfer of money, internet banking, making it easier to manage our own funds and, most recently, contactless payments to speed up transactions. Technology companies have also jumped on board with Apple and Android Pay facilitating payment by simply tapping your phone on a payment terminal, and these services are becoming available via Smart Watches too. Soon, you'll have contactless payment capability added to pieces of jewellery (A payment wedding ring anyone?) followed by the embedding of a suitable chip under the skin of a fingertip.

However, as world government becomes more centralised, the benefits of virtual currencies may begin to outweigh the pressures (and costs involved) to maintain more traditional, fiat monetary systems. All we can suggest is that you "watch this space."

How to protect your business against ransomware attacks

Bristol IT Company can provide protection against ransomware with Sophos Intercept X or Sophos Exploit Prevention, so, to proof your systems against this threat, get in touch today. Call us on 0117 3 700 777 or email This email address is being protected from spambots. You need JavaScript enabled to view it.


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Bristol IT Company team at the Quorum

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