Privacy-focused cryptocurrencies (e.g., Monero, Zcash, or Dash in certain modes) use advanced cryptographic features (ring signatures, zero-knowledge proofs, stealth addresses) to conceal transaction details and significantly hinder chain analysis. Criminals leverage these enhanced anonymity mechanisms to layer illicit funds, often circumventing external mixers by moving assets from mainstream cryptocurrencies into privacy coins, then rapidly cycling them through multiple wallets or exchanges. In many cases, they exploit unlicensed or poorly regulated platforms that offer privacy coin trading, enabling them to avoid standard KYC requirements and obscure the true source or destination of transactions. By masking inputs, outputs, and wallet connections, privacy coins complicate investigators’ ability to trace digital asset flows and remain a favored tool for hard-to-track laundering at scale.
Privacy Coins
Tactics
Criminals exploit the on-chain obfuscation inherent in privacy coins to sever direct links between illicit origins and laundered funds, thereby increasing transactional complexity.
Risks
Criminals leverage inherent anonymity features (e.g., ring signatures, stealth addresses, zero-knowledge proofs) in privacy-focused cryptocurrencies, which fundamentally obscure transaction details and ownership. This built-in anonymity is the primary vulnerability, enabling layering that undermines traceability and hampers AML monitoring.
Unlicensed or poorly regulated virtual asset platforms, P2P trading services, and instant swap channels offering privacy coin transactions with minimal or absent KYC enable criminals to layer funds rapidly and anonymously. These weak channel controls compound the obfuscation provided by privacy coins.
Indicators
Large and frequent conversions from mainstream cryptocurrencies into privacy coins without a clear business rationale or holding period.
Short-interval transfers of privacy coins across multiple exchanges, making it difficult to trace the original source or destination.
An account consistently employs advanced privacy-enhancing features (e.g., ring signatures, stealth addresses) that exceed typical usage for the account’s stated transaction or business purposes.
Multiple customer accounts under the same controller funnel digital assets into a single or limited set of privacy coin wallets, lacking an apparent relationship or documented economic link.
Entity headquartered in a jurisdiction with weak AML oversight, conducting most of its financial activity in privacy coins despite having no stated crypto-centric products or services.
Frequent or large trades executed on unlicensed or poorly regulated platforms offering privacy coin trading, with minimal or absent KYC procedures.
Data Sources
- Consolidates information on regulatory environments and AML/CFT enforcement levels by jurisdiction.
- Flags high-risk or poorly regulated regions where privacy coin usage may be prevalent or unmonitored, helping investigators target higher-risk geographic corridors for privacy coin transactions.
- Includes records on VASP licensing status, transaction logs, and KYC procedures for cryptocurrency exchanges and platforms.
- Aids in detecting reliance on unlicensed or poorly regulated platforms offering privacy coin trading with minimal or non-existent KYC checks, highlighting elevated risks of laundering activity.
- Contains verified customer data, including identities, beneficial owners, and account relationships.
- Helps identify cases where multiple accounts controlled by the same individual or entity funnel funds into privacy coin wallets without a clear business rationale, flagging potential layering or structuring across multiple accounts.
Provides on-chain transaction details such as transaction IDs, blockchain addresses, timestamps, and amounts, even for privacy coins that employ obfuscation features (e.g., ring signatures, stealth addresses).
Enables partial tracing of transaction flows and identification of rapidly moving assets into and out of privacy coin wallets, supporting investigations into layering and structuring attempts using privacy-focused cryptocurrencies.
Captures detailed records of trades and conversions, including timestamps, trading pairs, volumes, and counterparties involved in converting mainstream cryptocurrencies into privacy coins.
Assists in identifying large or frequent conversions into privacy coins for potential layering, as well as cross-exchange rapid transfers that obscure the source or destination of funds.
Mitigations
Apply deeper scrutiny to customers transacting with privacy-focused cryptocurrencies by verifying the legitimacy of coin sourcing and destination. Request additional supporting documentation, such as proof of prior legitimate holdings or confirmations from regulated exchanges, to ensure transaction volumes align with declared business or personal income. This heightened review helps uncover the misuse of privacy coin features to mask illicit funds.
Implement specialized monitoring rules to detect rapid or high-volume conversions between mainstream cryptocurrencies and privacy coins, as well as frequent short-interval transfers across multiple wallets or exchanges. Flag patterns indicating layering attempts, such as recurring privacy coin deposits immediately followed by withdrawals to unrelated addresses, to disrupt the obfuscation of fund origins.
Leverage advanced blockchain analytics tools capable of detecting suspicious wallet clusters and transaction flows commonly associated with privacy coin laundering. Although privacy coins obscure transaction details, these solutions can identify repeat deposit and withdrawal addresses, frequent wallet changes, and other usage patterns that indicate the hidden large-scale movement of illicit funds.
Cross-check customer claims and wallet addresses against publicly available data and external intelligence to identify involvement with blacklisted platforms or addresses known for privacy coin laundering. Validate that the stated usage of privacy coins matches verifiable business or personal details, such as public profiles and online commerce activities.
- Restrict or temporarily block transactions involving unlicensed or poorly regulated platforms offering privacy coin trading.
- Require customers engaging with privacy coins to provide evidence of the platform’s regulatory compliance or documented business justification.
- If inconsistencies appear, suspend related transactions until compliance checks are satisfied.
Instruments
- Criminals exploit built-in anonymity features (e.g., ring signatures, stealth addresses) to hide the flow of illicit funds.
- They rapidly convert mainstream cryptocurrencies into privacy coins, obscuring transaction origins and beneficiaries.
- By cycling these coins through many short-interval transfers across wallets or exchanges, they break transactional links that investigators rely on for traceability.
- Criminals move privacy coins through multiple self-custodial wallets, each with unique addresses, to layer funds and mask ownership.
- Poorly regulated or unregulated wallet services may not enforce KYC, allowing anonymous creation of new addresses used solely for concealing illicit asset flows and breaking transaction trails.
Service & Products
- Large-volume privacy coin transactions are negotiated privately, bypassing the scrutiny of formal exchange order books.
- This private channel can obscure the true parties to a trade, further complicating any chain-of-custody analysis.
- Direct user-to-user transactions often lack robust KYC/AML checks, allowing criminals to swap illicitly obtained mainstream crypto for privacy coins anonymously.
- By arranging private trades and avoiding centralized oversight, they can obscure the flow of funds and hamper investigators’ efforts to trace transactions.
- Near-instant swaps between mainstream cryptocurrencies and privacy coins enable quick layering steps with minimal records.
- Anonymous conversion at multiple stages breaks transaction trails and frustrates forensic tracing by investigators.
- Criminals can rapidly convert mainstream cryptocurrencies into privacy-oriented coins through exchanges that have minimal or lax KYC requirements.
- These quick conversions hide the original source of funds and complicate chain analysis by breaking transactional links between deposit and withdrawal addresses.
- Multiple wallet addresses can be used to further fragment and shuffle privacy coin holdings, obscuring transactional history.
- Non-custodial wallets often lack verification checks, letting criminals circulate funds without disclosing their identities.
Actors
Illicit operators knowingly leverage privacy-focused cryptocurrencies by:
- Converting mainstream cryptocurrency proceeds into privacy coins, concealing the true origin of funds from financial institutions.
- Rapidly cycling those funds through multiple wallet addresses or exchanges, fragmenting the transaction trail.
- Using unlicensed or poorly regulated platforms with minimal or no KYC, bypassing institutional checks and making it difficult for financial institutions to identify suspicious flows.
Virtual asset service providers, including both centralized and peer-to-peer platforms, are exploited by criminals seeking to:
- Trade mainstream cryptocurrencies for privacy coins while avoiding robust KYC checks.
- Break traceability links by layering transactions across multiple providers.
- Operate under poor or non-existent regulatory oversight, further complicating compliance and investigative efforts for financial institutions.
References
Moiseienko, A., Izenman, K. (2019, September). From intention to action: Next steps in preventing criminal abuse of cryptocurrency. Royal United Services Institute for Defence and Security Studies. https://www.rusi.org/explore-our-research/publications/occasional-papers/intention-action-next-steps-preventing-criminal-abuse-cryptocurrency
Costa, A. (2023). Preventing financial crime in cryptoassets: Investigating illicit funds flows in a cross-chain world. Elliptic.https://www.elliptic.co/hubfs/Elliptic_LEA_Typologies_2023_Report.pdf
Elliptic. (2020). Financial crime typologies in cryptoassets: The Concise Guide for Compliance Leaders. Elliptic. http://www.elliptic.co . https://www.elliptic.co/hubfs/Financial%20Crime%20Typologies%20in%20Cryptoassets%20Guides%20(All%20Assets)/Typologies_Concise%20Guide_12-20.pdf