The Company Behind Zcash Announces Proposed Solution to Trusted Setup
Cointelegraph By Joeri Cant's original article for cointelegraph.com reduced by 50%
Electric Coin Company, which launched and supports the development of privacy-coin Zcash recently published a paper called: Halo: Recursive Proof Composition without a Trusted Setup. "The concept is a proof that verifies the correctness of another instance of itself, allowing any amount of computational effort and data to produce a short proof that can be checked quickly.Sean's discovery involves 'nested amortization' - repeatedly collapsing multiple instances of hard problems together over cycles of elliptic curves so that computational proofs can be used to reason about themselves efficiently, which eliminates the need for a trusted setup." In cryptography, a trusted setup is when a set of initial parameters are created that at a later stage will be destroyed. It is called a trusted setup because one must trust the person who created the parameters to destroy them rather than keep them for future illicit gains.
The Electrical Coin Company points out that trusted setups are difficult to coordinate, could present a systemic risk and always have to be repeated for each major protocol upgrade. According to ECC, the removal of trusted setups should present a substantial improvement in safety for upgradeable protocols. The authors of the paper, Sean Bowe, Daira Hopwood and Jack Grigg, claimed that they obtained the first practical example of recursive proof composition without a trusted setup, using only ordinary cycles of elliptic curves.
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CN [too long; didn’t read]
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