Blockchain Security Training Blockchain Risk Mitigation Questions and Answers

Question 1

A financial institution is implementing a permissioned blockchain for inter-bank transfers.
They are concerned about unauthorized nodes joining the network and potential data tampering by internal actors.
Which risk mitigation strategy is MOST crucial for addressing these specific concerns?

Accepted Answer

Establishing a robust governance framework with strict identity and access management (IAM) controls.

Answer

Implementing a Proof-of-Work consensus algorithm to make tampering computationally expensive.

Answer

Using hardware security modules (HSMs) for all transaction signing.

Answer

Conducting frequent, automated smart contract audits to detect vulnerabilities.

Question 2

A decentralized application (dApp) development team is preparing for launch. To minimize the risk of financial loss due to unforeseen code exploits after deployment, they have allocated a significant portion of their budget to security. Which of the following risk mitigation measures provides the highest level of assurance by mathematically proving the correctness of the smart contract's logic against its formal specification?

Accepted Answer

Formal verification.

Answer

Engaging multiple independent security firms for code audits.

Answer

Running a comprehensive bug bounty program with large rewards.

Answer

Implementing a continuous integration/continuous delivery (CI/CD) pipeline with static analysis tools.

Question 3

A company is building a blockchain-based supply chain solution. To enhance data privacy, they need to verify claims (e.g., 'the shipment temperature remained within range') without revealing the underlying sensitive data on the public ledger. Which cryptographic technique is specifically designed to mitigate this data privacy risk?

Accepted Answer

Zero-knowledge proofs (ZKPs).

Answer

Multi-signature schemes.

Answer

Hashing algorithms like SHA-256.

Answer

Homomorphic encryption.

Question 4

Which of the following represents a proactive, non-technical risk mitigation strategy for an enterprise adopting blockchain technology, aimed at addressing operational uncertainties and potential legal or compliance issues?

Accepted Answer

Developing a comprehensive risk management framework (RMF) that aligns with industry standards and regulatory expectations.

Answer

Implementing real-time blockchain analytics to monitor for illicit activities.

Answer

Storing the majority of digital assets in offline cold storage wallets.

Answer

Deploying nodes across multiple geographic regions and cloud providers to prevent downtime.

Question 5

A new Proof-of-Stake blockchain is concerned about a 'long-range attack,' where an attacker with old, sold-off private keys could create a long alternative chain from the genesis block to trick new nodes. What is a common mitigation strategy built into modern Proof-of-Stake protocols to counter this specific risk?

Accepted Answer

Implementing weak subjectivity checkpoints or trusted setup mechanisms.

Answer

Requiring a very high number of block confirmations for transactions.

Answer

Increasing the block gas limit to make building a long chain more expensive.

Answer

Using a deterministic algorithm for validator selection.

Question 6

An organization wants to mitigate the risk of catastrophic fund loss from a single point of failure, such as a lost private key or a rogue employee. Which of the following operational security measures directly addresses this risk by requiring multiple parties to approve a transaction?

Accepted Answer

Implementing a multi-signature (multi-sig) wallet or scheme.

Answer

Using a Hierarchical Deterministic (HD) wallet.

Answer

Enforcing two-factor authentication (2FA) on all exchange accounts.

Answer

Conducting regular penetration testing of network infrastructure.