{"version":"1.0","provider_name":"\u00c9tienne Ghys","provider_url":"https:\/\/perso.ens-lyon.fr\/ghys","author_name":"ghys","author_url":"https:\/\/perso.ens-lyon.fr\/ghys\/author\/ghys\/","title":"Des maths dans votre passe sanitaire - \u00c9tienne Ghys","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"RnFXH0vXxH\"><a href=\"https:\/\/perso.ens-lyon.fr\/ghys\/2021\/09\/15\/des-maths-dans-votre-passe-sanitaire\/\">Des maths dans votre passe sanitaire<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/perso.ens-lyon.fr\/ghys\/2021\/09\/15\/des-maths-dans-votre-passe-sanitaire\/embed\/#?secret=RnFXH0vXxH\" width=\"600\" height=\"338\" title=\"\u00ab\u00a0Des maths dans votre passe sanitaire\u00a0\u00bb &#8212; \u00c9tienne Ghys\" data-secret=\"RnFXH0vXxH\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script>\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n<\/script>\n","description":"https:\/\/www.lemonde.fr\/sciences\/article\/2021\/09\/15\/des-maths-dans-votre-passe-sanitaire_6094702_1650684.html Les QR codes sont gorg\u00e9s de math\u00e9matiques. Le passe sanitaire est constitu\u00e9 de 7&nbsp;225 petits carr\u00e9s blancs ou noirs, rang\u00e9s en 85 lignes et 85 colonnes, qui permettent d\u2019encoder le statut vaccinal, ou le r\u00e9sultat d\u2019un test, ou le certificat de r\u00e9tablissement. Cela pose quelques probl\u00e8mes math\u00e9matiques et informatiques tr\u00e8s int\u00e9ressants. Le premier probl\u00e8me &hellip; Continuer la lecture de &rarr;"}