Blockchain Security Engineer Quiz Total 10 Questions Please enter your email: 1. How do ‘layer 2’ solutions on blockchain address scalability without compromising security? Layer 2 solutions do not address scalability; they focus on improving transaction privacy They compromise security by moving transactions to less secure, centralized platforms By completely bypassing the blockchain’s consensus mechanism, introducing new risks Handle transactions off-chain to reduce congestion, with mechanisms to maintain security 2. What is the significance of ‘cross-chain technology’ in blockchain ecosystems, and what are the potential security vulnerabilities? Eliminates all security vulnerabilities by using advanced encryption Only used for data analysis, with no security implications Facilitates interoperability but introduces attack vectors between chains Reduces blockchain functionality in favor of enhanced security 3. In the context of decentralized applications (dApps), what are common security pitfalls, and how can they be avoided? Reentrancy attacks, improper access control, and logic flaws; mitigated by testing and audits Using only well-known programming languages guarantees dApp security The biggest pitfall is overemphasis on security, which can hinder usability dApps are inherently secure; common security practices from traditional apps are sufficient 4. Explain the role of ‘public key infrastructure’ (PKI) in blockchain technologies and its importance in securing transactions. PKI is used to increase the transaction processing speed on blockchains Secures transactions by verifying entity identities, preventing impersonation Its only role is to encrypt the entire blockchain for added security PKI decreases the overall security of the blockchain by introducing vulnerabilities 5. How does the Delegated Proof of Stake (DPoS) consensus mechanism impact blockchain security? Increases the blockchain’s vulnerability to external hacking attempts DPoS mechanisms have no impact on security, only on consensus speed Improves efficiency but may risk security if too centralized Decreases security by removing encryption from transaction verification 6. How can ‘social engineering’ attacks specifically target blockchain users, and what are effective countermeasures? Phishing or scamming for private keys; countered with education and secure storage Blockchain technology is immune to social engineering attacks The only effective countermeasure is to stop using blockchain technologies Countermeasures include using longer blockchain addresses to confuse attackers 7. What are the implications of ‘quantum computing’ on current blockchain encryption methods? Expected to make blockchain transactions significantly faster with no security implications Will have no effect on blockchain security or encryption methods Poses a threat by potentially breaking current cryptographic algorithms Quantum computing will decrease the overall security of the internet, but not blockchain 8. How does ‘atomic swapping’ between blockchains enhance security or introduce new vulnerabilities? Eliminates intermediaries but requires robust, audited smart contracts Significantly increases the risk of double spending attacks They introduce no new vulnerabilities; atomic swaps are inherently secure Atomic swaps are less secure because they rely on centralized exchanges 9. What best describes the purpose of ‘chain reorganization’ in blockchain security? A process for decentralizing the blockchain further A method for attackers to double-spend coins Correcting forks to adhere to the longest valid chain Reducing transaction times by reorganizing block sequences 10. What is the significance of ‘hardware security modules’ (HSMs) in managing blockchain private keys? They are used primarily to speed up transaction verification times They make it easier to recover lost private keys They decrease the security of private keys by storing them in a centralized location They enhance key security by providing a secure environment for key management Loading … Question 1 of 10
