The EU Innovation Hub for Internal Security has released a report denouncing the utilization of privacy coins and cryptocurrency mixers, citing the challenges they pose for regulation and law enforcement. These tools obscure transaction trails, making it extremely difficult to monitor illicit activities. According to the report, mixers and privacy coins have been complicating tracing efforts for years, with newer technologies like Mimblewimble and zero-knowledge proofs further masking the visibility of cryptocurrency addresses, balances, and transactions. The EU Innovation Hub for Internal Security is a collaborative agency comprising members from various European agencies, established to provide solutions aiding internal security organizations in the EU and Member States. Their inaugural report delves into encryption technologies, exploring legislative, technical, and developmental perspectives. It emphasized the obstacles posed by privacy coins including Monero, Zcash, Grin, and Dash, along with mixing services and non-compliant crypto exchanges. The report underscored the emerging threats from technologies like Mimblewimble and zero-knowledge proofs which conceal transaction identities, making it challenging to trace and prevent illegal activities. While encryption technologies are crucial for securing digital assets, they can also be misused by criminals to evade detection. Despite the challenges, the report mentioned that law enforcement could still investigate and potentially track these activities with access to suspects' private keys. It advocated for a balanced regulatory approach that addresses security concerns without impeding technological innovation, striving for a harmonious balance between privacy and public safety.