The data format created by blockchain technology has built-in security features. It is based on consensus, decentralization, and cryptographic principles to guarantee transaction trust. Most distributed ledger technologies (DLT) and blockchain systems group data into blocks, each containing a transaction or sequence of transactions. A cryptographic chain is almost impossible to alter since every new block connects to every block that came before it. Each transaction within a block is verified and approved by a consensus mechanism, ensuring its veracity and accuracy.

Blockchain technology offers decentralization by enabling participation from members of a distributed network. The transaction record cannot be changed by a single user, and there is no single point of failure. However, blockchain technology differs significantly in terms of security.

What Are The Security Differences Between Blockchain Types?

Blockchain networks might differ regarding who can participate and who controls the data. Networks are often classified as public or private based on who is permitted to join and permissionless or permissioned based on how members access the network.

Public Blockchain

Public blockchain networks often enable anybody to join and members to remain anonymous. A public blockchain validates transactions and achieves consensus using internet-connected machines. Bitcoin is the most well-known public blockchain example, and it obtains consensus through “bitcoin mining.” The bitcoin network’s computers, or “miners,” attempt to solve a complicated cryptographic challenge to generate proof of work and confirm the transaction. This network has few identification and access constraints other than public keys.

Private Blockchain

Private blockchains usually allow only known organizations to join and utilize identities to validate membership and access credentials. The groups join together to build a secret, members-only “business network.” In a permissioned network, a private blockchain obtains consensus using a process known as “selective endorsement,” in which recognized users validate the transactions. Members can only maintain the transaction ledger with particular access and permissions. More identification and access constraints are required for this network type.

When developing a blockchain application, it is crucial to determine which form of the network would best meet your business objectives. For laws and regulatory reasons, private and permissioned networks are ideal. On the other hand, public and permissionless networks can achieve more decentralization and diffusion.

Public blockchains are open to the public, and anybody may join and validate transactions.

Private blockchains are mainly restricted to commercial networks. A single organization or consortium controls membership.

The number of processors participating in a permissionless blockchain is not limited.

Permissioned blockchains are only accessible to a specific group of users who have been issued identities via certificates.

Cyberattacks

While blockchain technology generates a tamper-proof database of transactions, blockchains are not susceptible to cyberattacks and fraud. Those with malicious intent can exploit known blockchain technology flaws and have succeeded in various hacks and scams. 

How Do Scammers Exploit Blockchain Technology?

Hackers and fraudsters threaten blockchains in four ways: phishing, routing, Sybil, and 51 percent assaults.

Phishing Attempts

Phishing is a fraud designed to get a user’s credentials. Fraudsters send emails to wallet key owners that appear to be from a reputable source. The emails employ bogus URLs to request users’ credentials. Knowing a user’s credentials and other confidential material may lead to losses for the individual and the blockchain network.

Attacks on Routing

Blockchains rely on huge data transfers in real-time. Hackers can steal data as it is being sent to internet service providers. Because blockchain participants cannot perceive the threat in a routing attack, everything appears normal. However, criminals have grabbed private data or currency behind the scenes.

Sybil Attacks

In a Sybil assault, hackers establish and utilize many phony network identities to overwhelm the network and bring it down. Sybil is a well-known novel character who suffers from multiple identity disorder.

51% of the Attacks

Mining necessitates a significant amount of computational power, especially for large public blockchains. However, if a group of miners could pool enough resources, they might control over half of the mining power on a blockchain network. Having more than half of the power implies you have control over the ledger and can alter it.

It should be noted that private blockchains are still not subject to 51 percent attacks.

Enterprise Blockchain Security: 

When developing an enterprise blockchain application, it is critical to address security at all tiers of the technological stack, as well as how to handle network governance and permissions. A complete security plan for an enterprise blockchain system comprises both standard security controls and controls that are unique to the technology. Some of the security controls unique to business blockchain platforms are as follows:

• Management of identity and access

• Management of key personnel

• Data security

• Secure communication

• Smart contract safety

• Transaction approval

Employ specialists to assist you in designing a compliant and secure system to help you reach your company objectives. Look for a production-grade platform for creating blockchain applications that can be deployed in your preferred technological environment, whether on-premises or through your preferred cloud vendor.