Zcash, Chase’s cryptocurrency partner, fixes bug that could have allowed ‘unlimited’ counterfeits

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Developers behind the privacy-focused cryptocurrency Zcash have patched a security flaw that could have allowed hackers to create an unlimited amount of counterfeit coins. Roughly one year ago cryptographer Ariel Gabizon discovered what appeared to be a “subtle” bug in zk-SNARKS, a tool to hide user identities and currency balances.