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The President of the Central Bank of Brazil spoke at the Blockchain Rio conference about the problems that the main financial regulator faces in implementing the digital real and spoke about plans to tokenize the national banking system. Roberto Campos Neto told Blockchain Rio participants that the main obstacle to the implementation of the central bank digital currency (CBDC) is the problem of scaling. "The main question was how to ensure the adoption of the digital real on a national scale without compromising the privacy of the participants in the settlements. The dilemma is that there is no solution yet: how to simultaneously ensure decentralization, programmability and privacy of the CBDC. Because digital registries and blockchain technologies are good in terms of transparency and speed, but have problems with privacy," the President of the Bank of Brazil explained. Campos Neto clarified that from a technological point of view, the scaling problem has not yet been solved.