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Zcoin launches Sigma protocol on mainnet, phases out of Zerocoin – CryptoNinjas

Home » Zcoin launches Sigma protocol on mainnet, phases out of Zerocoin – CryptoNinjas

Zcoin, which was the first privacy coin to explore the use of the Zerocoin protocol, today announced the mainnet launch of the Sigma protocol.

Sigma enables ZKP type privacy without trusted setup and uses cryptography with standard assumptions. The Zcoin team is already seeing wide use of Sigma’s privacy features and said that they are “excited to continue our mission in making Zcoin a private, uncensorable and free currency!”

Users should ensure that their wallets and Znodes are updated to Zcoin 13.8.2.

Key details:

  • Why it matters – ZKP protocols currently offer the highest level of anonymity via a burn and redeem process. But impractical and complex mechanisms have hindered its adoption.
  • What’s the problem – Trusted setups have been seen as a necessary evil to make ZKP privacy protocols efficient. However, the trusted setup process requires users to trust that it was done without error or collusion.
  • What’s at stake – Failure to implement and destroy a trusted setup correctly would allow an attacker to create perfect counterfeit privacy coins and inflate the supply.
  • The solution – The Sigma protocol is the realization of Zcoin’s vision to improve on privacy coin usability without compromising on security. It is the first zero-knowledge proof protocol without a trusted setup.

“When Zcoin first launched with the Zerocoin protocol, we always intended to tackle two core issues with existing deployed ZKP protocols – trusted setups and complicated constructions. Trusted setups go against the fundamental principle of blockchain which is “don’t trust, verify” and Sigma offers the first compelling alternative to solve all these issues.”
Poramin Insom, Founder and Core Developer of Zcoin

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