Types of Blockchain Security Threats: Comprehensive Guide for Blockchain Security

Question 1

Which of the following is NOT a type of blockchain security threat?

Accepted Answer

Malware Attack

Answer

Insider Threat

Answer

Cyberattack

Answer

Protocol-Level Vulnerability

Question 2

What type of blockchain security threat involves malicious actors exploiting vulnerabilities in the underlying communication protocol?

Accepted Answer

Protocol-Level Vulnerability

Answer

Sybil Attack

Answer

Smart Contract Bug

Answer

Double Spending Attack

Question 3

Which of these is an example of an internal blockchain security threat?

Accepted Answer

Malicious Insider Attack

Answer

Phishing Attack

Answer

Denial of Service Attack

Answer

Replay Attack

Question 4

What type of blockchain security threat exploits a flaw in a smart contract that can lead to the loss of funds?

Accepted Answer

Smart Contract Bug

Answer

Protocol-Level Vulnerability

Answer

Sybil Attack

Answer

Man-in-the-Middle Attack

Question 5

Which of the following is a potential impact of a Sybil attack on a blockchain?

Accepted Answer

Disruption of Consensus

Answer

Loss of Funds

Answer

Data Breach

Answer

Smart Contract Failure

Question 6

What type of security activity involves regular assessments to identify potential vulnerabilities in a blockchain system?

Accepted Answer

Security Audits

Answer

Blockchain Forensics

Answer

Penetration Testing

Answer

Cryptographic Analysis

Question 7

**Clarity and Accessibility:** Which type of blockchain security threat involves an attack on the network or its components, using methods like malware, hacking, or exploiting network vulnerabilities?

Accepted Answer

Cyberattack

Answer

Smart contract vulnerability

Answer

Internal threat

Answer

Protocol-level vulnerability

Question 8

**Clarity and Precision:** Which type of blockchain security threat arises from an insider with authorized access to the blockchain system, potentially leveraging their knowledge and permissions for malicious purposes?

Accepted Answer

Internal threat

Answer

Protocol-level vulnerability

Answer

Node hijacking

Answer

Cyberattack

Question 9

**Clarity and Precision:** Which type of blockchain security threat exploits weaknesses or flaws in the blockchain's underlying protocol or algorithm, potentially leading to unauthorized access or data manipulation?

Accepted Answer

Protocol-level vulnerability

Answer

Cyberattack

Answer

Internal threat

Answer

Node spoofing

Question 10

**Clarity and Correctness:** Which type of cyberattack involves a single entity gaining control over a majority of the network's computing power, potentially allowing them to manipulate transactions or block access to the blockchain?

Accepted Answer

51% attack

Answer

Internal threat

Answer

Node tampering

Answer

Protocol-level vulnerability

Question 11

**Clarity and Correctness:** Which type of cyberattack involves creating a large number of fake nodes to gain influence over the blockchain network, potentially disrupting its operation or manipulating consensus?

Accepted Answer

Sybil attack

Answer

Majority attack

Answer

Replay attack

Answer

Eclipse attack

Question 12

**Clarity and Accessibility:** Which blockchain security threat involves spending the same digital asset multiple times, potentially resulting in unauthorized duplication or theft?

Accepted Answer

Double-spending

Answer

Short-range attack

Answer

Malware

Answer

Phishing

Question 13

**Clarity and Precision:** Which type of security threat involves a flaw in a smart contract that allows an attacker to exploit the contract's logic and steal funds or gain unauthorized access?

Accepted Answer

Smart contract exploit

Answer

Spam

Answer

Cryptojacking

Answer

Protocol-level vulnerability

Question 14

**Clarity and Accessibility:** Which type of security threat involves disrupting or delaying the operation of the blockchain network by overwhelming it with excessive traffic or requests?

Accepted Answer

Denial-of-service attack

Answer

DNS hijacking

Answer

Phishing

Answer

Replay attack

Question 15

**Clarity and Accessibility:** Which type of social engineering threat involves tricking a user into revealing confidential information or accessing malicious websites, potentially compromising their blockchain accounts or funds?

Accepted Answer

Phishing

Answer

Short-range attack

Answer

Spam

Question 16

Which of the following is NOT a type of cyberattack that can target blockchain systems?

Accepted Answer

Spam

Answer

Malware

Answer

DDoS

Answer

Phishing

Question 17

Which of the following is an internal threat to blockchain security?

Accepted Answer

Malicious insider

Answer

DoS attack

Answer

External hacker

Answer

Protocol vulnerability

Question 18

Which of the following protocol-level vulnerabilities can allow attackers to compromise a blockchain system?

Accepted Answer

Double-spending

Answer

Internal theft

Answer

Spam attack

Question 19

Which of the following is a key factor in mitigating blockchain security threats?

Accepted Answer

Implementing strong encryption protocols

Answer

Increasing node count

Answer

Ignoring security updates

Answer

Allowing anonymous transactions

Question 20

Which of the following is a benefit of using blockchain technology in security applications?

Accepted Answer

Enhanced data integrity and immutability

Answer

Reduced energy consumption

Answer

Increased transaction speed

Answer

Lower transaction fees

Question 21

Which of the following is a best practice for developing secure blockchain applications?

Accepted Answer

Thorough code auditing

Answer

Ignoring security vulnerabilities

Answer

Reusing unverified code

Question 22

Which of the following is a key difference between blockchain security and traditional IT security?

Accepted Answer

Decentralized nature and immutability of blockchain data

Answer

Absence of regulatory oversight

Answer

Higher transaction costs

Question 23

Which of the following is a potential impact of blockchain security threats on businesses?

Accepted Answer

Financial losses

Answer

Reduced operational costs

Answer

Improved customer satisfaction

Answer

Increased sales

Question 24

Which of the following is a recommended approach for staying up-to-date on the latest blockchain security threats?

Accepted Answer

Monitoring industry publications and security alerts

Answer

Ignoring security updates

Answer

Relying solely on antivirus software