{"id":18113,"date":"2020-11-22T20:40:48","date_gmt":"2020-11-22T20:40:48","guid":{"rendered":"https:\/\/davidgerard.co.uk\/blockchain\/?p=18113"},"modified":"2022-02-23T21:28:44","modified_gmt":"2022-02-23T21:28:44","slug":"blockchain-magic-probably-doesnt-happen-sams-class-21-november-2020","status":"publish","type":"post","link":"https:\/\/davidgerard.co.uk\/blockchain\/2020\/11\/22\/blockchain-magic-probably-doesnt-happen-sams-class-21-november-2020\/","title":{"rendered":"Blockchain: Magic (Probably) Doesn\u2019t Happen \u2014 Sam&#8217;s Class, 21 November 2020"},"content":{"rendered":"<p>Sam Bowne at City College of San Francisco runs classes on cryptography and computer security. [<a href=\"https:\/\/samsclass.info\/\"><em>Samsclass<\/em><\/a>] He&#8217;s a fan of my writing, so he asked me to speak to his class CNIT 141: Cryptography for Computer Networks. [<a href=\"https:\/\/samsclass.info\/141\/141_F20.shtml\"><em>course page<\/em><\/a>]<\/p>\n<p>I did a somewhat remixed version of <a href=\"https:\/\/davidgerard.co.uk\/blockchain\/2018\/10\/09\/blockchain-why-magic-probably-doesnt-happen-how-to-sell-a-hash-tree-as-a-tech-revolution-royal-holloway-thursday-4-october-2018\/\">&#8220;Blockchain: Magic (Probably) Doesn\u2019t Happen&#8221;<\/a> from a couple of years ago \u2014 with a bit more on the frauds and scams.<\/p>\n<p>I start at the basics: what, actually, is a blockchain? How does it work? Because a lot of people who talk about blockchains just expect the audience to know &#8230; and they often don&#8217;t.<\/p>\n<p>We had lots of good questions afterwards. If you&#8217;ve heard this talk before, the questions start around 34:20. Note my lovely <a href=\"https:\/\/davidgerard.co.uk\/blockchain\/libra\/\"><em>Libra Shrugged<\/em><\/a> Zoom background. [<a href=\"https:\/\/youtu.be\/Lrcn2jFO6gQ\"><em>YouTube<\/em><\/a>]<\/p>\n<p>Sam&#8217;s put the slides up too. [<em><a href=\"https:\/\/samsclass.info\/141\/slides\/david%20gerard%20samsclass.pdf\">Samsclass<\/a>, PDF<\/em>]<\/p>\n<p>&nbsp;<\/p>\n<div class=\"jetpack-video-wrapper\"><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"735\" height=\"414\" src=\"https:\/\/www.youtube.com\/embed\/Lrcn2jFO6gQ?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en-GB&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/div>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<br><br><div align=\"center\"><p><a href=\"https:\/\/www.patreon.com\/bePatron?u=8420236\"><img src=\"https:\/\/davidgerard.co.uk\/blockchain\/wp-content\/uploads\/2021\/10\/become_a_patron_button.svg\" alt=\"Become a Patron!\" title=\"Become a Patron!\" width=217 height=51><\/a><br><p style=\"align:center;\" class=\"patreon-badge\"><i>Your subscriptions keep this site going. <a href=\"https:\/\/www.patreon.com\/bePatron?u=8420236\">Sign up today!<\/a><\/i><\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>A talk to Sam Bowne&#8217;s class CNIT 141: Cryptography for Computer Networks,  at City College of San Francisco.<\/p>\n","protected":false},"author":1,"featured_media":18119,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[1],"tags":[21,74,2069,2068,2748],"class_list":["post-18113","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorised","tag-bitcoin","tag-blockchain","tag-ccsf","tag-sam-bowne","tag-talk"],"jetpack_featured_media_url":"https:\/\/davidgerard.co.uk\/blockchain\/wp-content\/uploads\/2020\/11\/samsclass.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/posts\/18113","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/comments?post=18113"}],"version-history":[{"count":6,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/posts\/18113\/revisions"}],"predecessor-version":[{"id":18121,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/posts\/18113\/revisions\/18121"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/media\/18119"}],"wp:attachment":[{"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/media?parent=18113"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/categories?post=18113"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/davidgerard.co.uk\/blockchain\/wp-json\/wp\/v2\/tags?post=18113"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}