CCI Privacy Coins and Anonymity 2

Question 1

In a Monero transaction, what is the primary purpose of a ring signature?

Accepted Answer

To hide the true sender among a set of decoy outputs

Answer

Ring signatures mix the real spent output with decoys so an observer cannot tell which signer actually spent the funds.

Question 2

Since the August 2022 network upgrade, what is Monero's mandatory ring size?

Accepted Answer

16

Answer

The 2022 hard fork raised the fixed ring size from 11 to 16 (one real input plus 15 decoys).

Question 3

Which Monero feature ensures that a recipient's public address never appears on the blockchain?

Accepted Answer

Stealth (one-time) addresses

Answer

Stealth addresses derive a unique one-time destination for each payment, so the published address is never recorded on-chain.

Question 4

An investigator obtains a suspect's Monero private view key. What can the investigator do with it?

Accepted Answer

See incoming transactions to that wallet but not reliably confirm outgoing spends

Answer

The view key reveals incoming outputs to the wallet, but identifying outgoing spends requires key images from the spend key side.

Question 5

Which Monero technology conceals the transaction amounts on the blockchain?

Accepted Answer

RingCT (Ring Confidential Transactions)

Answer

RingCT, introduced in 2017, uses Pedersen commitments to hide amounts while still proving no coins were created.

CCI - Certified Cryptocurrency Investigator Practice Test