Why is Blockchain Security Important?

When we talk about blockchain security, we're not just talking about data protection. Because these are literally embedded in the code:

• Crypto assets
• Tokens
• NFTs
• Pool liquidity
• Governance rights

In short, what attackers often gain access to is not a user account or Personally Identifiable Information (PII), but the money itself.

In addition, all of this happens on decentralized blockchain networks, where most transactions are irreversible. Therefore, even a small mistake in blockchain security can quickly lead to serious and permanent losses.

Blockchain Assets Have Inherent Cash Value

In the traditional system, attackers try to access customer information, company documents, or user accounts. On a blockchain, smart contracts often have direct control over financial assets.

A smart contract can:

• Transfer tokens,
• Manage liquidity pools,
• Execute debt/credit transactions (lending/borrowing),
• Control collateral,
• Distribute rewards,
• Direct users to other protocols with their funds.

Therefore, if a contract contains vulnerability, millions of dollars can be drained to another address in a single transaction.

Ronin Bridge suffered a similar attack affecting approximately $620 million in assets; Wormhole was affected by the attack with a loss of approximately $325 million. All these examples truly illustrate how quickly blockchain attacks can grow and escalate.[1]

Transactions are Often Irreversible

One of the most important things that distinguishes a blockchain from traditional financial infrastructure is that transactions are irreversible.

What happens if a payment from a bank account is incorrect/incomplete? For credit card transactions, there is a chargeback process. Again, if a user account is compromised, at least the password can be reset and an older backup of the database can be restored.

However, on a blockchain, most of these options disappear the moment you receive approval to make an update and it's processed into the chain. There are only a few exceptional cases where a transaction can be altered, and even then, it requires very significant decisions across the network.

Therefore, in the world of blockchain security, we need to do more than just "fix it once after the attack." The only thing that truly matters is that the vulnerability is never created so that it's never needed.

Therefore, security audits, static analysis, testing processes, access controls, and key management should form the core of the system, not details to be added later.

No Central Authority Means Distributed Responsibility

In a centralized system, users have an institution to turn to: a support team or an administrator. But on the blockchain side, responsibility can be shared among users, developers, validators, and exchanges, as well as protocol teams and communities.

When an individual's private key is lost, a transaction is improperly signed, or access is granted to a malicious smart contract. There will be no “customer service” for the user to call.

When a major attack occurs, the response process is not always clear. Exchanges may freeze funds flowing from the attackers' addresses; validators may need to coordinate a response; developers rush to patch the exploited vulnerability; and communities across chains need to share information quickly.

The longer it takes for all these parties to act, the greater the loss becomes.

Potential Dangerous Risks Associated with the “Code is Law” Approach

This frequently seen “code is law” mentality, in the context of blockchain, implies that the system fundamentally operates according to written rules. However, the fact that the code enforces the rules does not mean the code is correct.

If it's wrong, the system continues to apply that flawed logic.

Moreover, this may not be limited to a single contract. Protocols within the DeFi ecosystem tend to be interdependent by nature.

One application might benefit from another protocol's liquidity, pricing data, collateral system, or tokens.

This is often referred to as "DeFi Lego." Composability allows for rapid iteration of new products. However, a flaw in one protocol can spread to other systems that depend on it.

Pools, lending platforms, yield applications, they are all connected. And in a connected system, security is only as strong as the weakest protocol in the chain.

Disclaimer

This content is for general informational purposes only and does not constitute technical or cybersecurity advice. An independent security assessment is recommended before implementing any application.

Sources

[1] Financial Stability Oversight Council, Report on Digital Asset Financial Stability Risks and Regulation, 2022, s. 71.

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