Without a doubt, blockchain technology has grown in popularity in recent years. Apart from its initial application in cryptocurrency, it is now being used in healthcare, real estate, smart contacts.
technology collects and stores data in groupings known as “blocks,” and each block can hold a set amount of data. When a block is full, it is chained to the previous full block, forming a data chain, hence the brilliant name “blockchain.”
The technology has been a great example of how security tenets in financial transactions and information transmission are transformed. It provides a one-of-a-kind data structure as well as built-in security features. Blockchain is based on the ideas of consensus, decentralization, and cryptography to ensure transaction trust.
However, many blockchain security issues have arisen due to faulty technology implementation.
BLOCKCHAIN SECURITY ACCORDING TO BLOCKCHAIN TYPE
To further explain blockchain security, it is necessary to first grasp the difference between public and private blockchain security. In terms of participation and data access capabilities, blockchain networks can have various effects. As a result, there are two forms of labeling for blockchain networks.
Blockchain networks can be private or public, depending on the privileges required for membership. The means for participants to acquire access to the network, on the other hand, are governed by whether the blockchain network is permissioned or permissionless.
• Public blockchain networks are open and might allow any user to join while maintaining participant anonymity.
• In private blockchain networks, identity is used to confirm membership and access privileges. Furthermore, they only allow familiar organizations to participate.
FIVE BLOCKCHAIN SECURITY ISSUES AND SOLUTIONS
Many people are right when they believe blockchain is inherently secure. Blockchain is unquestionably beneficial to organizations, but it has significant drawbacks due to specific security issues. Here are five of the top blockchain security challenges and their solutions.
- 51% ATTACKS
Miners play an important role in validating transactions on the blockchain, allowing them to develop even further. A [51% attack] is possibly the most dreaded threat in the entire blockchain business. These attacks are more likely to occur in the chain’s early stage, and a 51% attack does not apply to enterprise or private blockchains.
A 51% attack occurs when a single individual or organization (malicious hackers) collects more than half of the hash rate and seizes control of the entire system, which can be disastrous. Hackers can modify the order of transactions and prevent them from being confirmed. They can even reverse previously completed transactions, resulting in double-spending.
To prevent 51% attacks:
• Improve mining pool monitoring.
• Make certain that the hash rate is higher.
• Avoid using proof-of-work (PoW) consensus procedures.
- PHISHING ATTACKS
Phishing attacks on blockchain networks are increasing, causing [serious issues]. Individuals or company employees are frequently the targets of phishing attempts.
The hacker’s goal in a phishing attack is to steal the user’s credentials. They can send legitimate-looking emails to the owner of the wallet key. The user is required to enter login details via an attached fake hyperlink. Having access to a user’s credentials and other sensitive information might result in damages for both the user and the blockchain network. They are also vulnerable to follow-up attacks.
To prevent phishing attacks:
• Improve browser security by installing a verified add-on to notify you about unsafe websites.
• Improve device security by installing malicious link detection software as well as dependable antivirus software.
• Reconfirm with the partner if you receive an email requesting login details relating to the issue.
• Don’t click on the link until you have thoroughly reviewed it. Instead of clicking on the links, enter the address into your browser.
• Avoid open Wi-Fi networks when using an electronic wallet or other important banking transactions.
• Make sure your system and software are up to date.