Blockchain technology has the potential to revolutionize a wide range of industries, from finance and supply chain management to voting systems and identity verification.
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However, new challenges come with new technology, and the blockchain industry is no exception. This article will explore the top 5 cybersecurity threats facing the blockchain industry today.
Before we look at some of the threats, let us look at some blockchain hacks and how they occur.
- The Mt. Gox Hack
Mt. Gox was once the largest bitcoin exchange in the world, handling over 70% of all bitcoin transactions. In February 2014, the exchange announced that it had lost 850,000 bitcoins, worth approximately $450 million, due to a hack.
Security analysts later discovered that the hack had been occurring over several years, with the attackers stealing small amounts of bitcoin until they had accumulated a significant amount.
The exact details of how the hack occurred still need to be fully understood. Still, it is essential to note that the attackers may have exploited a vulnerability in the exchange’s system or gained access through malware.
The Decentralized Autonomous Organization (DAO) was a smart contract built on the Ethereum blockchain that functioned as a decentralized venture capital fund.
In June 2016, an attacker exploited a vulnerability in the DAO’s code and could steal approximately 3.6 million ETH, worth roughly $50 million.
The vulnerability that the attacker exploited was due to a flaw in the way that the DAO’s smart contract handled split function calls.
The attacker could repeatedly call the split function and drain the DAO’s funds.
Coincheck was a Japanese cryptocurrency exchange hacked in January 2018, resulting in the theft of approximately $530 million worth of NEM tokens.
The hack resulted from unauthorized access to the exchange’s hot wallet, which contained a large amount of cryptocurrency.
The exchange was forced to suspend all withdrawals and trading while it worked to secure its systems and investigate the attack.
Inadequate security measures that needed to be in place led to the hack of the hot wallet.
In July 2017, a hacker exploited a vulnerability in the Parity Wallet, a popular Ethereum wallet, and stole approximately $30 million worth of ETH.
The vulnerability was due to a flaw in the wallet’s multi-sig contract, which allowed the attacker to access the funds in the wallet.
The hack affected several high-profile projects and organizations using the Parity Wallet to store their funds, including Polkadot and Edgeless Casino.
Cryptopia was a New Zealand-based crypto-currency exchange hacked in January 2019, resulting in the theft of approximately $16 million worth of cryptocurrency.
The exact details of the hack still need to be fully understood. Still, it is essential to note the attackers may have gained access to the exchange’s systems through malware or by exploiting a vulnerability in the exchange’s system.
The hack caused significant damage to the exchange, forcing it to suspend all trading and withdrawals while it secured its systems and investigated the attack. It eventually filed for bankruptcy in May 2019.
One of the most significant threats to the security of blockchain networks is the possibility of a 51% attack. In a 51% attack, a group of miners control over half of the mining power on a particular blockchain network. With this level of control, they can reverse transactions, double-spend coins, and disrupt the network’s regular operation.
One high-profile example of a 51% attack occurred on the Ethereum Classic blockchain in January 2019. A group of attackers gained control of 51% of the network’s mining power and used it to steal nearly $1 million worth of cryptocurrency.
- Smart Contract Vulnerabilities
Smart contracts are self-executing contracts with the terms of the agreement between buyer and seller directly written into lines of code.
While they offer numerous benefits, such as increased efficiency and the ability to facilitate complex transactions, they also introduce new vulnerabilities.
In 2017, a hacker exploited a vulnerability in the code of a smart contract on the Ethereum blockchain and stole more than $50 million worth of cryptocurrency.
Since then, numerous other smart contract vulnerabilities have been discovered, highlighting the need for careful code review and testing before deploying smart contracts on the blockchain.
Phishing attacks are a common threat in the cybersecurity world, and the blockchain industry is no exception.
In a phishing attack, a hacker uses fake websites, emails, or other forms of communication to trick users into revealing sensitive information, such as login credentials or private keys.
One high-profile example of a phishing attack in the blockchain industry occurred in 2018 when a hacker impersonated the co-founder of a popular cryptocurrency exchange and sent phishing emails to users, tricking them into revealing their login credentials.
The hacker was able to steal more than $23 million worth of cryptocurrency as a result.
Insider attacks are a significant threat to any organization’s security, and the blockchain industry is no exception.
These attacks involve employees or contractors who have legitimate access to a company’s systems and use it to their advantage, either intentionally or unintentionally.
In 2019, a cybersecurity firm discovered that an employee of a cryptocurrency exchange had been stealing customer funds for more than a year.
The employee had access to the exchange’s hot wallet, which contained a large amount of cryptocurrency, and could make off with nearly $2 million before being caught.
Malware is software designed to disrupt, damage, or gain unauthorized access to a computer system.
In the blockchain industry, malware can target individuals or organizations involved in cryptocurrency transactions, potentially stealing funds or sensitive information.
In 2018, a malware called “CryptoShuffler” targeted cryptocurrency users.
The malware intercepts cryptocurrency transactions in progress and redirects the funds to the attacker’s wallet.
CryptoShuffler could steal more than $20,000 worth of cryptocurrency before being detected.
As the blockchain industry continues to grow and evolve, it is crucial to stay vigilant against these and other cybersecurity threats.
By understanding the risks and taking steps to protect against them, we can continue making the most of blockchain technology’s numerous benefits.
It may include implementing strong security measures, such as two-factor authentication and secure password practices, and keeping up-to-date with the latest security best practices and updates.
In addition, it is essential to be cautious of any suspicious activity or communication, as phishing attacks and other forms of social engineering can be a significant threat.
It is always a good idea to verify the authenticity of any website or email before entering sensitive information or completing a transaction.
Finally, choosing reliable and secure platforms for storing and using cryptocurrency is crucial, as these platforms’ security can significantly impact the overall safety of your assets.
While the blockchain industry presents many exciting opportunities, it is essential to remain aware of the potential cybersecurity threats and take steps to protect yourself and your assets.
With the proper precautions, we can continue securely utilizing blockchain technology’s many benefits.
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