OUR Blog
Market researcher
Yuliia Horbenko
Market researcher
Aug 14 2017

Using blockchain technology to boost cybersecurity

Navigating the online world safely has become a real concern over the last few years and, looking at how intense and sophisticated some of the recent hacker attacks around the world have been, it seems like things are bound to only get worse.

Even though hackers are getting better at hacking, the ways to combat them are also improving very fast. In fact, we already have a nearly impenetrable technology, known as blockchain, which can be used to protect our data from cyber attacks and improve cybersecurity across industries.

This article provides an overview of how blockchains can improve the online security of any business, ensuring that data cannot be damaged, stolen, or lost.

Blockchain technology 101

Blockchain technology has been around for just under a decade, initially introduced as a way to store and/or send the first cryptocurrency, Bitcoin. However, as the technology has gradually spread worldwide, people have begun using it in a variety of ways in numerous industries, including as a means to increase cybersecurity.

What is a blockchain?

Blockchains are distributed networks that can have millions of users all over the world. Every user can add information to the blockchain and all data in the blockchain is secured through cryptography. Every other member of the network is responsible for verifying that the data being added to the blockchain is real. This is done using a system of three keys (private, public, and the receiver’s key) that allow members to check the veracity of the data while also confirming who it comes from.

How do blockchains get formed?

A verified piece of data forms a block which then has to be added to the chain. To do this, blockchain users have to use their respective keys and powerful computing systems to run algorithms that solve very complex mathematical problems. When a problem is solved, the block is added to the chain and the data it contains exists on the network forever, meaning that it cannot be altered or removed.

blockchain image

How can data be updated?

In order to make updates to a particular piece of data, the owner of that data must add a new block on top of the previous block, creating a very specific chain of code. If anything, even something as small as a comma, gets altered from how it appears in a previous block, the entire chain across the network also changes accordingly. This means that every single alteration or change to any piece of data is tracked and absolutely no data is lost or deleted because users can always look at previous versions of a block to identify what is different in the latest version. Using this thorough form of record-keeping makes it easy for the system to detect blocks that have incorrect or false data, preventing loss, damage, and corruption.

Decentralized storage, recordkeeping, and peer-to-peer sharing

Another important thing to note about blockchain users is that they are able to store all of the data in their network on their computer, if they want to (and very many of them do). This results in two things. First, they can earn money for renting their “extra” storage space and, second, they ensure that the chain will not collapse. If, for instance, someone who is not the owner of a piece of data (say, a hacker) tries to tamper with a block, the whole system analyzes every single block of data to find the one that differs from the rest (or from the majority). If the system finds this type of block, it simply excludes it from the chain, identifying it as false.

Blockchain technology is designed in such a way that there is no central authority or storage location. Every user on the network plays a part in storing some or all of the blockchain. Everyone is responsible for verifying the data that is stored and/or shared to make sure false data cannot be added and existing data cannot be removed.

Preventing fraud and data theft

Blockchain technology provides one of the best tools we currently have to protect data from hackers, preventing potential fraud and decreasing the chance of data being stolen or compromised.

In order to destroy or corrupt a blockchain, a hacker would have to destroy the data stored on every user’s computer in the global network. This could be millions of computers, with each one storing a copy of some or all the data. Unless the hacker could simultaneously bring down an entire network (which is near impossible), undamaged computers, also known as “nodes”, would continue running to verify and keep record of all the data on the network. The impossibility of a task like taking down a whole chain increases along with the amount of users on a network. Bigger blockchain networks with more users have an infinitely lower risk of getting attacked by hackers because of the complexity required to penetrate such a network.

This complex structure provides blockchain technology with the ability to be the most secure form of storing and sharing information online that we’ve discovered so far. That’s why innovators have begun applying the technology in different sectors to prevent fraud and increase protection of data.

blockchain image

How Guardtime uses blockchain technology to safeguard data

Guardtime has already become successful in using blockchain technology to keep important data safe.

The company takes away the need to use keys for verification. Instead, they distribute every piece of data to nodes throughout the system. If someone tries to alter the data, the system analyses the whole mass of chains, compares them to the metadata packet and then excludes any that don’t match up.

This means that the only way to wipe the entire blockchain out is to destroy every single separate node. If just one node remains running with the correct data, the whole system can be restored, even if all of the other nodes are compromised.

Guardtime’s system works in such a way that it’s always able to detect when a change has been made to the data and is constantly verifying the changes. This ensures that there is no discrete way to tamper with blocks in the chain and the data remains uncompromised.

Preventing Distributed Denial of Service (DDoS) attacks

The principle behind DDoS attacks is simple but devastating. Hackers can use several techniques to instigate an attack, essentially sending myriads of junk requests to a website, increasing traffic until the site can no longer keep up with the requests. The attack goes on until the site gets overwhelmed with requests and crashes. DDoS attacks have been happening at an increased frequency recently, affecting bigger companies like Twitter, Spotify, SoundCloud, and more.

The current difficulty in preventing DDoS attacks comes from the existing Domain Name System (DNS). DNS is a partially decentralized one-to-one mapping of IP addresses to domain names and works much like a phone book for the Internet. This system is responsible for resolving human-readable domain names (like steelkiwi.com) into machine-readable IP addresses (made up of numbers).

The fact that it is only partially decentralized means that it is still vulnerable to hackers because they are able to target the centralized part of DNS (the one which stores the main bulk of data) and continue crashing one website after another.

Using blockchains to prevent DDoS attacks

Implementing blockchain technology would fully decentralize DNS, distributing the contents to a large number of nodes and making it nearly impossible for hackers to attack. Domain editing rights would only be granted to those who need them (domain owners) and no other user could make changes, significantly reducing the risk of data being accessed or changed by unauthorized parties. By using blockchains to protect the data, a system can ensure that it’s invulnerable to hackers, unless every single node is simultaneously wiped clean.

Some companies are already implementing blockchain in this area to prevent DDoS attacks from occurring. For instance, Blockstack provides a fully decentralized option for DNS. The concept behind the company is to make the entire worldwide web decentralized by removing all third parties from managing web servers, ID systems, and databases.

If current DNS would operate on blockchain, users would still be able to register domain names, but only authorized owners would be able to make changes to their domains. Since the data would be stored on many different nodes and every other user on the network would have a copy of the entire data on the blockchain, it would be virtually impossible to hack or destroy it completely.

MaidSafe is a similar company based in the UK. Their goal is also to decentralize the web and create something like an alternative Internet where users are able to run apps, store data, and do everything else they normally do online, but in a more secure environment. When signing up for this service, users can choose how much of their personal storage space they want to dedicate to the network. The system then provides safecoin, a cryptocurrency, to compensate users for the value (space) they offer the network. Every file placed onto the MaidSafe network is encrypted, fragmented, and shared among users. The only person that can make the data readable again is its owner, ensuring that the data is not accessible by anyone other than the authorized owner.

Innovative uses for blockchain technology

As more people join the worldwide web and technology continues to develop, more data gets produced and more hackers will attempt to steal or corrupt that data. The technology behind blockchain is versatile and incredibly useful for the future of the Internet, allowing users to better secure their data.

Innovative uses for blockchain technology are already becoming a part of other fields beyond cryptocurrencies and can be especially useful to boost cybersecurity. By implementing rigorous encryption and data distribution protocols on a network, any business can ensure that their information will remain safely intact and out of the reach of hackers.

If we’ve managed to captivate your interest with the ambitious prospects of the blockchain’s future in cyber security, please feel free to contact one of our sales representatives and ask them about the ways to implement this technology into your own business, thus making its benefits a part of your own life.

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