China's Ministry of State Security states that foreign intelligence agencies use the "illusion" of anonymity in cryptocurrencies to spy on citizens, claiming that it is impossible to track cryptocurrency transactions. "Blockchain transactions leave a permanent digital footprint, and the conversion between fiat currencies and cryptocurrencies makes it easy to reveal a person's identity," say PRC intelligence agencies. MINISTRY OF STATE SECURITY WARNS CITIZENS NOT TO BE LURED BY ‘ILLUSION’ OF ANONYMOUS TRANSACTIONS