{"id":28271,"date":"2020-09-07T10:52:52","date_gmt":"2020-09-07T07:52:52","guid":{"rendered":"https:\/\/forklog.com\/en\/?p=28271"},"modified":"2025-08-27T10:50:49","modified_gmt":"2025-08-27T07:50:49","slug":"iohk-proposes-solution-to-protect-ethereum-classic-from-51-attacks","status":"publish","type":"post","link":"https:\/\/forklog.com\/en\/iohk-proposes-solution-to-protect-ethereum-classic-from-51-attacks\/","title":{"rendered":"IOHK Proposes Solution to Protect Ethereum Classic From 51% Attacks"},"content":{"rendered":"<p>IOHK, the developer of the Cardano cryptocurrency, <a href=\"https:\/\/www.crowdcast.io\/e\/9epmnuoc\/register?session=1\" target=\"_blank\" rel=\"noopener noreferrer\">proposed<\/a> to introduce checkpoints in every third block of the Ethereum Classic network to shield it from 51% attacks.<!--more--><\/p>\n<p>The protocol, named Ouroboros Byzantine Fault Tolerant (OBFT), would permit the network to reject blocks produced by attackers.<\/p>\n<p>It is envisaged that the checkpoints would be verified by specially trusted nodes. These could include the Cardano blockchain as well as the Bitcoin blockchain.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-109396\" src=\"https:\/\/forklog.com\/wp-content\/uploads\/050920_ETC_checkpoints.jpg\" alt=\"IOHK proposes a solution to protect Ethereum Classic from 51% attacks\" width=\"1702\" height=\"1092\" srcset=\"https:\/\/forklog.com\/wp-content\/uploads\/050920_ETC_checkpoints.jpg 1702w, https:\/\/forklog.com\/wp-content\/uploads\/050920_ETC_checkpoints-300x192.jpg 300w, https:\/\/forklog.com\/wp-content\/uploads\/050920_ETC_checkpoints-1024x657.jpg 1024w, https:\/\/forklog.com\/wp-content\/uploads\/050920_ETC_checkpoints-768x493.jpg 768w, https:\/\/forklog.com\/wp-content\/uploads\/050920_ETC_checkpoints-1536x985.jpg 1536w\" sizes=\"auto, (max-width: 1702px) 100vw, 1702px\" \/><\/p>\n<p>The size of the trusted-node network remains to be determined, as it will influence the time required to reach consensus.<\/p>\n<p>Earlier in August, the Ethereum Classic network faced three 51% attacks. The last time, the depth of the reorganisation <a href=\"https:\/\/forklog.com\/en\/news\/ethereum-classic-hit-by-another-51-attack\">stood at<\/a> 7000 blocks, which is equivalent to roughly two days of mining.<\/p>\n<p>Later, ETC developers <a href=\"https:\/\/forklog.com\/en\/news\/ethereum-classic-labs-to-seek-regulators-involvement-to-protect-the-network-from-51-attacks\">said<\/a> that to protect the network they intend to enlist regulators and impose strict oversight over platforms renting hashing power.<\/p>\n<p>Subscribe to ForkLog news on Telegram: <a href=\"https:\/\/t.me\/forklogfeed\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">ForkLog Feed<\/a> \u2014 the full news feed, <a href=\"https:\/\/telegram.me\/forklog\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">ForkLog<\/a> \u2014 the most important news and polls.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>IOHK, the developer of the Cardano cryptocurrency, proposed to introduce checkpoints in every third block of the Ethereum Classic network to protect it from 51% attacks.<\/p>\n","protected":false},"author":1,"featured_media":26216,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"select":"1","news_style_id":"","cryptorium_level":"","_short_excerpt_text":"","creation_source":"","_metatest_mainpost_news_update":false,"footnotes":""},"categories":[3],"tags":[1395,476,628],"class_list":["post-28271","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news-and-analysis","tag-51-percent-attack","tag-ethereum-classic","tag-iohk"],"aioseo_notices":[],"amp_enabled":true,"views":"10","promo_type":"1","layout_type":"","short_excerpt":"","is_update":"","_links":{"self":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/28271","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/comments?post=28271"}],"version-history":[{"count":1,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/28271\/revisions"}],"predecessor-version":[{"id":28272,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/posts\/28271\/revisions\/28272"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/media\/26216"}],"wp:attachment":[{"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/media?parent=28271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/categories?post=28271"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/forklog.com\/en\/wp-json\/wp\/v2\/tags?post=28271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}