CCI - Certified Cryptocurrency Investigator Privacy Coins and Anonymity Questions and Answers

Question 1

An investigator traces illicit funds to a Zcash address.
However, upon examining the transaction on a block explorer, the sender, receiver, and amount are all encrypted.
This indicates the funds were sent to which type of address?

Accepted Answer

A z-address (shielded)

Answer

A t-address (transparent)

Answer

A multi-signature address

Answer

A Tor-gapped address

Question 2

Which privacy-enhancing technology, central to Monero, makes it computationally infeasible for an outside observer to determine which of a group of possible signers actually authorized a transaction?

Accepted Answer

Ring Signatures

Answer

Stealth Addresses

Answer

zk-SNARKs

Answer

CoinJoin

Question 3

An investigator analyzing the Bitcoin blockchain encounters a single large transaction with numerous inputs and outputs of identical value. This structure makes it difficult to apply the common-input-ownership heuristic. Which privacy technique was most likely used?

Accepted Answer

CoinJoin

Answer

Chain Hopping

Answer

Dandelion++ Protocol

Answer

Ring Confidential Transactions (RingCT)

Question 4

What is the primary function of a "stealth address" as implemented in privacy coins like Monero?

Accepted Answer

To generate a unique, one-time public address for each transaction to protect the recipient's privacy.

Answer

To encrypt the transaction amount so it cannot be viewed on the blockchain.

Answer

To mix the sender's digital signature with decoys to obscure the origin.

Answer

To broadcast transactions through a series of nodes to hide the originating IP address.

Question 5

A Certified Cryptocurrency Investigator is assigned a case where a ransomware payment was made using Monero. The victim provides the transaction ID. What is the most significant challenge the investigator will face when attempting to trace the funds on the public ledger?

Accepted Answer

The sender's address, recipient's address, and transaction amount are all obscured by default.

Answer

The transaction fees are too high for analysis tools to process.

Answer

Monero's block time is too slow, causing significant data retrieval delays.

Answer

The transaction ID is encrypted and can only be viewed by the Monero development team.

Question 6

Some privacy-focused cryptocurrencies implement the Dandelion++ protocol. What specific aspect of a transaction does this protocol aim to obscure?

Accepted Answer

The originating IP address from which the transaction was first broadcast.

Answer

The on-chain link between the sender and receiver.

Answer

The total value of cryptocurrency held in a user's wallet.

Answer

The identity of the miner who includes the transaction in a block.

An investigator traces illicit funds to a Zcash address.However, upon examining the transaction on a block explorer, the sender, receiver, and amount are all encrypted.This indicates the funds were sent to which type of address?

An investigator traces illicit funds to a Zcash address.
However, upon examining the transaction on a block explorer, the sender, receiver, and amount are all encrypted.
This indicates the funds were sent to which type of address?