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Hard Fork Six

Beam has completed a necessary security hard fork to address a subtle Bulletproofs rangeproof vulnerability discovered in the Beam core code. The issue was responsibly disclosed, reviewed by the developers, patched in a non-public branch, and resolved through a coordinated network upgrade. This post explains the technical background, our current risk assessment, and a proposed lustration process that would allow the community to verify supply integrity with a one-time, limited disclosure of legacy outputs.