CBP - Certified Bitcoin Professional Fundamental Cryptography Concepts Questions and Answers

Question 1

In the context of Bitcoin's public-key cryptography, which of the following statements accurately describes the relationship between a private key, a public key, and a Bitcoin address?

Accepted Answer

A Bitcoin address is a hashed version of the public key, which is mathematically derived from the private key.

Answer

A public key is a hashed version of the Bitcoin address, which is mathematically derived from the private key.

Answer

A private key is a hashed version of the public key, which is used to generate a Bitcoin address.

Answer

A Bitcoin address and a public key are identical, and both are derived from the private key.

Question 2

A user wants to send a Bitcoin transaction. To prove they are the legitimate owner of the funds, they must create a digital signature. Which cryptographic component is used to create this signature?

Accepted Answer

The user's private key

Answer

The recipient's public key

Answer

The transaction hash

Answer

The user's public key

Question 3

Which characteristic of a cryptographic hash function is most critical for ensuring the immutability of the Bitcoin blockchain?

Accepted Answer

Pre-image resistance

Answer

Fast computation

Answer

Fixed-size output

Answer

Collision resistance

Question 4

A Bitcoin user has a 12-word mnemonic seed phrase. What is the primary function of this phrase in relation to cryptographic keys?

Accepted Answer

It is used to deterministically generate all private keys in a hierarchical deterministic (HD) wallet.

Answer

It is a human-readable representation of the user's public key.

Answer

It directly encrypts the transaction data on the blockchain.

Answer

It serves as a symmetric key to decrypt incoming Bitcoin.

Question 5

In asymmetric cryptography (also known as public-key cryptography), which key is kept secret and which is shared?

Accepted Answer

The private key is kept secret, and the public key is shared.

Answer

Both the public and private keys are kept secret.

Answer

The public key is kept secret, and the private key is shared.

Answer

Both the public and private keys are shared.

Question 6

Bitcoin's Proof of Work algorithm primarily uses the SHA-256 cryptographic hash function. What is the result of applying the SHA-256 function to a block's header data?

Accepted Answer

A 256-bit hash value.

Answer

A 512-bit hash value.

Answer

The private key for the next block.

Answer

A variable-length string of characters.