CCAS Exam Dumps : Certified Cryptoasset Anti-Financial Crime Specialist Examination

FATF standards specify that Virtual Asset Service Providers (VASPs) must keep records related to transactions and customer due diligence for at least 5 years after the completion of the transaction or end of the business relationship. This retention period facilitates effective AML investigations and regulatory reviews.

DFSA AML Module aligns with this timeframe, reinforcing that comprehensive record retention supports audit trails and compliance verification.

Arestricted blockchainis one where participation—either in transaction validation, data access, or both—is limited to selected entities rather than being open to the public.

Consortium blockchain (D)is a common type of restricted blockchain in which multiple pre-approved organizations collectively manage the network. It offers partial decentralization but with controlled membership, making it suitable for regulated environments such as financial services, supply chain tracking, and interbank settlements.

Other options explained:

Hybrid (A):Combines elements of public and private chains, but not necessarily “restricted” in the strict governance sense.

Public (B):Open to anyone to join, read, and write data; not restricted.

Private (C):While private blockchains are also restricted, in AML/CFT guidance, “restricted blockchain” generally refers to consortium arrangements involving multiple vetted participants, rather than a single organization’s closed chain.

Regulatory and technical literature in DIFC/ADGM contexts note thatconsortium blockchainsallow for compliance controls, participant vetting, and transaction monitoring—making them particularly suitable for financial ecosystems where controlled access is essential.

A 51% attack refers to a situation where a single miner or group controls more than 50% of the blockchain network’s computational (hashing) power. This majority control allows them to manipulate the blockchain ledger by double-spending or blocking transactions.

This term is widely recognized in blockchain security contexts and is referenced in typology papers on crypto financial crime risks, including those issued by UAE authorities and FATF.

Supporting extracts:

DFSA AML thematic reviews mention the risk of manipulation and double spending in blockchains susceptible to 51% attacks.

Typology reports on cryptoasset risks highlight computational power concentration as a core vulnerability.

“51% refers to the percentage of total mining power or computational power in the network” is the standard definition across crypto AML/CFT frameworks【31.92._TFS_Typology_Paper_Eng__4.pdf; AMLCFT_Guidance_for_FIs.pdf】.

Thus,Cis correct.