Privacy Coins Under Viewing Key Compromise

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Anonymity guarantees of privacy-oriented cryptocurrencies are garnering negative attention from lawmakers who view them as antinomic to accountability. Having recognized their potential for innovation, however, regulators may not want to outright ban privacy coins but instead seek a middle ground where financial oversight is effective, and still some privacy is maintained. Mature designs, such as Zcash, Monero, or Firo, facilitate this through so-called viewing keys that can be disclosed to thir