{"id":276,"date":"2016-10-11T20:24:51","date_gmt":"2016-10-11T20:24:51","guid":{"rendered":"http:\/\/www.talkcrypto.org\/blog\/?p=276"},"modified":"2017-07-29T00:49:24","modified_gmt":"2017-07-29T00:49:24","slug":"wellington-blockchain-meetup-securing-transactions-on-the-blockchain","status":"publish","type":"post","link":"https:\/\/www.talkcrypto.org\/blog\/2016\/10\/11\/wellington-blockchain-meetup-securing-transactions-on-the-blockchain\/","title":{"rendered":"Wellington October Blockchain Meetup"},"content":{"rendered":"<p>Another interesting evening at the Wellington Bitcoin\/Blockchain meetup. I presented\u00a0on &#8220;How transactions are secured on the blockchain&#8221;, got some audience participation\u00a0and gave a live demo as well.<\/p>\n<p><iframe title=\"Securing Transactions on the Blockchain\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/eWebkCfTaKM?start=128&#038;feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>We took a closer look at the genesis block from the bitcoin blockchain and looked at the components of a single block. We highlighted the point that to understand how a blockchain works, it&#8217;s valuable to understand <a href=\"https:\/\/www.anintegratedworld.com\/whats-in-a-block\/\" target=\"_blank\" rel=\"noopener noreferrer\">what&#8217;s in a single block<\/a>.<\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-medium wp-image-290 aligncenter\" src=\"https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/Screen-Shot-2016-02-23-at-5.17.55-PM-1-300x219-300x219.png\" alt=\"screen-shot-2016-02-23-at-5-17-55-pm-1-300x219\" width=\"300\" height=\"219\" \/><\/p>\n<p>We went through some hands on Proof of Work examples where I dusted off my origami skills and made some candidate blocks. We had a race to see who could roll a 3 or lower. The winner then got their version of the block secured on the blockchain.<\/p>\n<p><img decoding=\"async\" class=\"size-medium wp-image-281 aligncenter\" src=\"https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/2016-10-11-22.09.20-288x300.jpg\" alt=\"2016-10-11-22-09-20\" width=\"288\" height=\"300\" srcset=\"https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/2016-10-11-22.09.20-288x300.jpg 288w, https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/2016-10-11-22.09.20-671x700.jpg 671w, https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/2016-10-11-22.09.20-32x32.jpg 32w, https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/2016-10-11-22.09.20.jpg 763w\" sizes=\"(max-width: 288px) 100vw, 288px\" \/><\/p>\n<p>There were some really good discussions afterwards on China&#8217;s involvement, on bitcoin scaling, on how blocks were constructed and if someone could create their own block if it followed all the right specifications. Many of the audience members contributed their knowledge and point of view also.<\/p>\n<p>Here is a pdf\u00a0to the presentation.\u00a0<a href=\"https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/securing-the-blockchain.key.pdf\">securing-the-blockchain-key<\/a><\/p>\n<p>Thanks to Sebastian and Wyn from API Talent for their hospitality.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Another interesting evening at the Wellington Bitcoin\/Blockchain meetup. I presented\u00a0on<\/p>\n","protected":false},"author":1,"featured_media":279,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,16],"tags":[],"class_list":["post-276","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ethereum","category-meetups"],"featured_image_urls":{"full":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large.jpeg",2048,1152,false],"thumbnail":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large-150x150.jpeg",150,150,true],"medium":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large-300x169.jpeg",300,169,true],"medium_large":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large-768x432.jpeg",640,360,true],"large":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large-1024x576.jpeg",640,360,true],"1536x1536":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large.jpeg",1536,864,false],"2048x2048":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large.jpeg",2048,1152,false],"chromenews-featured":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large.jpeg",1024,576,false],"chromenews-large":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large.jpeg",825,464,false],"chromenews-medium":["https:\/\/www.talkcrypto.org\/blog\/wp-content\/uploads\/2016\/10\/CudnUS5UEAAp4zJ.jpg-large.jpeg",590,332,false]},"author_info":{"info":["seandotau"]},"category_info":"<a href=\"https:\/\/www.talkcrypto.org\/blog\/category\/ethereum\/\" rel=\"category tag\">Ethereum<\/a> <a href=\"https:\/\/www.talkcrypto.org\/blog\/category\/meetups\/\" rel=\"category tag\">Meetups<\/a>","tag_info":"Meetups","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/posts\/276","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/comments?post=276"}],"version-history":[{"count":10,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/posts\/276\/revisions"}],"predecessor-version":[{"id":1090,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/posts\/276\/revisions\/1090"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/media\/279"}],"wp:attachment":[{"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/media?parent=276"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/categories?post=276"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.talkcrypto.org\/blog\/wp-json\/wp\/v2\/tags?post=276"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}