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During the last September Cardano development update, there was an interesting discussion of Pledge in relation to Sybil attack prevention.

Firstly, let’s define what is a Sybil attack as not all of our readers might know it. Sybil attack is when the attacker subverts the reputation system of a network service by creating a large number of pseudonymous identities and uses them to gain a disproportionately large influence. …


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You probably read Charles Hoskinson and the Infinite Machine Part I. If no, we advise you to start with it.

This article is Part II which will focus on the days of Charles as Ethereum CEO.

In one of the recent AMAs, somebody asked Charles Hoskinson if he liked the way he is presented in “The Infinite Machine: How an Army of Crypto-hackers Is Building the Next Internet with Ethereumbook? …


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The first Cardano Kyiv Meetup on the topic of Ouroboros protocol took place in Ukraine on August 28, 2020. The speaker was Prof Roman Oliynykov from IOHK, cryptographer, IT security researcher, lecturer, Ph.D. The meetup was sponsored by AzureADA (ticker: AZUR) — Cardano stake pool operator.

Roman Oliynykov introduces the Ouroboros family protocol to the Ukrainian crypto community and those who watched the meetup online: “Ouroboros protocol is really interesting and has really bright ideas that within it and I’m very proud to be part of the team that works and develops such protocol.”

Roman spoke a little bit about the general properties of consensus protocols, specifics of Proof-of-stake protocols, about Ouroboros classic protocol, how it works, and the family starting from Ouroboros Praos and finishing with Ouroboros Crypsinous. …

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