The Central Bank of Brazil has made a significant strategic shift in its central bank digital currency (CBDC) project, Drex. According to local media reports, the bank is abandoning the decentralized blockchain elements originally planned and will instead deliver a centralized version, targeting a launch date in 2026. The decision stems primarily from the immaturity of privacy solutions required for a fully decentralized CBDC.
From Decentralized to Centralized
Fabio Araujo, coordinator of the Drex project, confirmed the change. He stated that the new proposal will be rolled out in two phases. The first phase, expected to launch next year, will not include decentralized or tokenization elements. The second phase will continue to develop and implement blockchain technologies, aiming to introduce decentralized features later. This means many use cases tested during the pilot phases—which relied on programmability—will not be available initially.
The bank previously selected Hyperledger Besu, an Ethereum-compatible open-source blockchain platform, for Drex in 2023. However, the centralized pivot raises questions about whether the technology will continue to be used. Araujo noted that while privacy solutions for the decentralized version have improved, they still fall short of the security requirements of Brazil’s financial system. “We found good privacy solutions, but apparently they’re not enough. We need to put this to the test,” he told Valor Economico.
Privacy as a Roadblock
Privacy has been a persistent challenge for Drex’s decentralized ambitions. Last year, the central bank postponed the pilot due to insufficient privacy solutions that lacked the secrecy and verifiability of bank-level transactions. The current decision reflects the ongoing difficulty in balancing transparency, programmability, and confidentiality. By opting for a centralized architecture, the bank can bypass these technical hurdles and deliver a functional CBDC more quickly.
Functionality and Outlook
Despite dropping blockchain, the centralized Drex will introduce a lien reconciliation solution, enabling credit operations with various types of collateral. The specific tools for this functionality have not yet been announced.
Brazil’s approach mirrors a global trend: central banks often face trade-offs between innovation and operational reliability. By phasing its rollout, the bank aims to deliver a usable digital currency in the near term while preserving the option to integrate blockchain technology as it matures. Analysts view this as a pragmatic move that prioritizes system stability and privacy compliance over technological ideals.