CBSE Credential Curriculum and Topics

Question 1

Which of the following is a key component of blockchain security?

Accepted Answer

Hashing and cryptography

Answer

Hashing and cryptography are fundamental pillars of blockchain security, providing the core mechanisms for data integrity and secure transactions. Hashing ensures data integrity by creating unique, fixed-size outputs for data blocks, making any tampering immediately detectable. Cryptography, particularly public-key cryptography, secures transactions and user identities, protecting data confidentiality and authenticity within the decentralized network.

Question 2

What is a 51% attack?

Accepted Answer

A situation where a malicious actor controls over 50% of a network’s computing power

Answer

A 51% attack is a significant threat to proof-of-work blockchains, where a single entity or group gains control of more than half of the network's total mining hash rate. With this majority, the attacker can potentially prevent new transactions from being confirmed, reverse confirmed transactions, and effectively double-spend cryptocurrencies. This undermines the network's integrity and the immutability of its ledger.

Question 3

Which of the following is NOT considered a blockchain attack vector?

Accepted Answer

Cloud computing latency

Answer

A blockchain attack vector refers to a method or path that an attacker can use to gain unauthorized access or compromise a blockchain system. Sybil attacks, phishing attacks, and key management attacks are all known methods to exploit vulnerabilities within blockchain networks or related user practices. Cloud computing latency, while an operational concern affecting performance, is not inherently an attack vector used by malicious actors to compromise security.

Question 4

Why is risk assessment important in blockchain security?

Accepted Answer

To identify potential vulnerabilities in blockchain systems

Answer

Risk assessment is a crucial step in blockchain security because it systematically identifies, analyzes, and evaluates potential threats and vulnerabilities within a blockchain system. By understanding these risks, security experts can prioritize and implement appropriate countermeasures to protect against them. This proactive approach helps safeguard the integrity, confidentiality, and availability of blockchain data and assets.

Question 5

What is the purpose of conducting smart contract audits?

Accepted Answer

To detect and fix vulnerabilities in the smart contract code

Answer

Smart contracts are self-executing agreements whose code directly controls valuable assets on a blockchain. Auditing them is essential to meticulously review the code for bugs, logical flaws, and security vulnerabilities that could be exploited by attackers. A thorough audit helps prevent financial losses, ensures the contract behaves as intended, and builds trust in decentralized applications.

(CBSE) Certified Blockchain Security Expert Practice Test

(CBSE) Certified Blockchain Security Expert Practice Test

CBSE Credential Curriculum and Topics