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 Hacking a cryptographic container and modifying data on a Brazilian electronic ballot. In <em>Proceedings of the 21st Brazilian Symposium on Information and Computational Systems Security</em>, October 04, 2021, Belém, Brasil. SBC, Porto Alegre, Brasil, 211-224. DOI: <a href="https://doi.org/10.5753/sbseg.2021.17317">https://doi.org/10.5753/sbseg.2021.17317</a>.