Date: Fri, 18 Nov 2016 21:53:05 +0100 From: Solar Designer <solar@...nwall.com> To: announce@...ts.openwall.com Subject: [openwall-announce] An analysis of Zcash's use of the Equihash proof-of-work scheme Hi, I've just published a new article titled "An analysis of Zcash's use of the Equihash proof-of-work scheme" on the Openwall website: http://www.openwall.com/articles/Zcash-Equihash-Analysis As Wikipedia explains, "Zcash is a decentralized and open-source cryptocurrency that offers privacy and selective transparency of transactions. Zcash payments are published on a public blockchain, but the sender, recipient, and amount of a transaction remain private." This article presents results of analysis performed on request from and funded by the Zcash company. Although Equihash itself is defined in its designers' paper, Zcash's use of it (most notably, the parameter values) and Zcash community's optimizations of Equihash solvers and Zcash miners are a moving target. Thus, unlike other Openwall articles, this is a time-sensitive report, which might get obsoleted soon (but will likely retain its historical value). Here's Zcash company's blog post announcing my work on this: https://z.cash/blog/the-zcash-equihash-analysis.html As it correctly says, I am also one of three judges for the Zcash Open Source Miner Challenge, where we have received multiple Equihash solver submissions (some of which are also Zcash miners), and will decide on the winners soon. The Challenge, which is also supported by Zcash company, has already substantially improved the general public's understanding on possible Equihash optimizations, thereby limiting the advantage that (users of) private Zcash miners might have. Alexander
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