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The next /r/ethereum Eth2 AMA starts Feb 5 at 1pm UTC. Collated questions and answers from the two previous AMAs (6 and 12 months ago) courtesy of EthHub https://docs.ethhub.io/other/ethereum-2.0-ama …
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Here's the trick. Let G be a group of unknown order, e.g. an RSA group with an unknown factorisation modulus. Let g in G and x an integer exponent. The prover claims h=g^x. The verifier sends a random prime p. The prover sends g^{x//p}. The verifier checks h=g^{x//p}^p*g^{x%p}.
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This year the Stanford Blockchain Conference has a session dedicated to groups of unknown order. A super simple trick—the Wesolowski trick developed for VDFs—is unleashing a mini cryptographic revolution (for VDFs, accumulators, SNARKs) and the rebirth of RSA.pic.twitter.com/zQ1X8MnJ0w
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three 1-hour zero-knowledge study clubs on polynomial commitments hosted by @AnnaRRose part 1—https://youtu.be/bz16BURH_u8 part 2—https://youtu.be/BfV7HBHXfC0 part 3—https://youtu.be/TbNauD5wgXMHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
The basic idea is simple. Every validator commits to a secret and all the commitments are placed in a list. Using simple exponentiation (plus ZKP or fraud proof) every beacon proposer privately shuffles the list. Onchain randomness is then used to sample from the list.
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Single Secret Leader Election (SSLE) strengthens Eth2 proposers and committees against network-level DoS (and other adaptive attacks). We're seriously considering the "DDH and Shuffling" construction in section 6 of https://eprint.iacr.org/2020/025.pdf
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Justin Ðrake proslijedio/la je Tweet
New RSA assumptions are needed for VDFs. Ethereum Foundation supports analysis of them with a number of bounties. Https://rsa.cash
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Ben wrote a fantastically accessible resource on BLS12-381. Thank you
@benjaminion_xyz :)https://hackmd.io/@benjaminion/H1lkISO3JU …Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Eth2 phase 0 should launch after a multi-client testnet with X clients has been stable (no reboot or downtime) for Y months.
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Justin Ðrake proslijedio/la je Tweet
Finally we dig into VDFs! @Josephbonneau, Assistant Prof at NYU + co-author of the VDF paper, joins us to share what VDFs are, how they can be used &more! https://www.zeroknowledge.fm/103 cc:@AnnaRRose@fredhrson - a good follow-up to the Randomness ep with@drakefjustin!Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
SLONK is a conceptually simple universal SNARK with the smallest known proof size (~0.5kB) and verification time. Concrete prover time for practical circuits still unknown but promising thanks to good constants.https://ethresear.ch/t/slonk-a-simple-universal-snark/6420 …
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$100K prize pool for accelerating repeated 1024-bit modular squaring on an AWS F1 FPGA. Winner gets $5K per nanosecond shaved over the baseline (28.6ns per square). This helps for RSA VDFs, RSA accumulators, and RSA SNARKs.https://twitter.com/_Supranational/status/1189989760674103296 …
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Did my part of the Aztec ceremony with the slowest machine so far
10 ETH bounty (valid 5 years) for first person to compromise my randomness.pic.twitter.com/umH6iu1LLS
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"Eth3—quantum security" talk online shortly after Google's quantum supremacy claims :)https://www.youtube.com/watch?v=DDxpGMGSGDE …
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ePrint papers (
@IACRePrint) with "blockchain" in title: 2013—0/882 (0%) 2014—1/1029 (0.1%) 2015—4/1257 (0.3%) 2016—14/1196 (1.2%) 2017—23/1262 (1.8%) 2018—39/1251 (3.1%) 2019—41/1234 (3.3%)Hvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Justin Ðrake proslijedio/la je Tweet
New paper with
@aszepieniec and@benafisch: Supersonic a true SNARK (<8KB, ~75ms verif.) without trusted setup. It uses a new polynomial commitment in groups of unknown order called DARK. We can compile polynomial IOPs such as Sonic/Marlin/Plonk to SNARKs https://eprint.iacr.org/2019/1229.pdfHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Here are my Devcon slides on "Eth2—collaboration culture"https://docs.google.com/presentation/d/1I8_uRX_aP_WflsWJ1SrpXYrVaTtLMF3v8rHgDeMYe7I/edit?usp=sharing …
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And here are the slides on "Eth3—quantum security"https://docs.google.com/presentation/d/1mtiFFupsDVppGE5zm-lQX3UfRJzWUTmx7TrdPU8iJ6g/edit?usp=sharing …
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Below are my slides for two Tel Aviv talks: one on RSA VDFs and the other on SNARK prover ASICs. One more tomorrow on Eth3 :) https://docs.google.com/presentation/d/1VUAdBmy99HFt6L2KeRvnvlzIqoTYXl0Eb17_SNqriXc/edit?usp=sharing … https://docs.google.com/presentation/d/1mFNYa4vIXj9PQ632BJK2HsvJexHjYczEHLerqTN2tck/edit?usp=sharing …https://twitter.com/jdetychey/status/1173168361288675329 …
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Three flavours of universal SNARKs: * powers of Tau (Sonic, PLONK) * RSA or class group (Supersonic) * FRI-based (e.g. StarkWare STARKs) Add Halo and this may be the beginning of the end for non-universal schemes such as Groth16.
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