CBSE Key Management and Wallet Security 1 — Questions and Answers
Question 1: What is a Hardware Security Module (HSM) primarily used for in blockchain environments?
- To increase transaction throughput on the network
- To securely generate, store, and manage cryptographic keys (Correct answer)
- To provide network routing for blockchain nodes
- To validate smart contract execution logic
Correct answer: To securely generate, store, and manage cryptographic keys
HSMs are tamper-resistant hardware devices purpose-built to securely generate, store, and manage cryptographic keys, preventing key extraction even by privileged users.
Question 2: What is the primary purpose of a BIP-39 mnemonic seed phrase?
- To encrypt individual blockchain transactions
- To provide a human-readable backup encoding for generating private keys (Correct answer)
- To verify consensus between distributed nodes
- To authenticate users on blockchain applications
Correct answer: To provide a human-readable backup encoding for generating private keys
BIP-39 defines a standard for generating a 12-24 word mnemonic phrase that encodes the entropy used to deterministically derive a wallet's private keys.
Question 3: Which wallet type provides the strongest protection against remote network-based attacks?
- Hot wallet connected to an exchange
- Browser-based web wallet
- Cold wallet stored on an air-gapped hardware device (Correct answer)
- Mobile wallet with biometric authentication
Correct answer: Cold wallet stored on an air-gapped hardware device
Cold wallets store private keys offline on air-gapped devices, making them immune to remote or network-based attacks since keys never touch an internet-connected system.
Question 4: What does a Hierarchical Deterministic (HD) wallet primarily enable?
- Multiple users sharing the same private key securely
- Generation of an unlimited tree of key pairs from a single master seed (Correct answer)
- Faster transaction validation through parallel processing
- Automatic smart contract deployment and management
Correct answer: Generation of an unlimited tree of key pairs from a single master seed
HD wallets (BIP-32) allow generating a hierarchical tree of key pairs from one master seed, enabling organized key management without storing each individual key separately.
Question 5: What is the primary security risk of using a hot wallet for storing cryptocurrency assets?
- Slow transaction processing speeds
- Higher on-chain transaction fees
- Exposure of private keys to internet-connected systems vulnerable to remote attacks (Correct answer)
- Incompatibility with standard blockchain protocols
Correct answer: Exposure of private keys to internet-connected systems vulnerable to remote attacks
Hot wallets are connected to the internet, making private keys vulnerable to malware, phishing, and remote attacks that could expose or steal keys.
Question 6: What is the primary security advantage of a multi-signature (multisig) wallet?
- Faster transaction confirmation times
- Lower gas fees for on-chain operations
- Elimination of single points of failure by requiring multiple key approvals (Correct answer)
- Automatic cryptographic key rotation
Correct answer: Elimination of single points of failure by requiring multiple key approvals
Multisig wallets require M-of-N signatures to authorize transactions, ensuring that a single compromised key cannot enable unauthorized fund transfers.
Question 7: What does the BIP-44 derivation path m/44'/0'/0'/0/0 define in an HD wallet?
- A network routing address for peer discovery
- A smart contract deployment address on Ethereum
- A specific child key derived following the BIP-44 hierarchical structure (Correct answer)
- An encryption key used to secure transaction data in transit
Correct answer: A specific child key derived following the BIP-44 hierarchical structure
BIP-44 defines a structured derivation path (purpose/coin-type/account/change/index) enabling standardized, interoperable key generation across compatible HD wallets.
CBSE Key Management and Wallet Security 1
What is a Hardware Security Module (HSM) primarily used for in blockchain environments?