{"id":151,"date":"2018-05-20T16:30:18","date_gmt":"2018-05-20T16:30:18","guid":{"rendered":"https:\/\/www.zaskolit.cz\/?p=151"},"modified":"2018-06-20T11:08:02","modified_gmt":"2018-06-20T09:08:02","slug":"blog","status":"publish","type":"post","link":"https:\/\/www.digitalnisebeobrana.cz\/en\/blog\/","title":{"rendered":"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9?"},"content":{"rendered":"
\n
<\/div>\n
\n
\n

Tl;dr? Nep\u0159estalo!<\/h3>\n
<\/figcaption><\/figure>\n

V \u00fater\u00fd, 15. 5. 2018 byl na webu https:\/\/efail.de<\/a> zve\u0159ejn\u011bn podrobn\u00fd popis zranitelnost\u00ed v implementac\u00edch PGP\/GPG v roz\u0161\u00ed\u0159en\u00edch emailov\u00fdch klient\u016f. Jedn\u00e1 se o zneu\u017eit\u00ed zp\u016fsobu, jak\u00fdm dan\u00e1 roz\u0161\u00ed\u0159en\u00ed pracuj\u00ed se zpr\u00e1vami.
\nTo je d\u016fle\u017eit\u00e1 zpr\u00e1va. Zp\u016fsob \u0161ifrov\u00e1n\u00ed jako takov\u00fd prolomen nebyl, tud\u00ed\u017e lze i nad\u00e1le pova\u017eovat PGP\/GPG za bezpe\u010dn\u00e9!<\/strong><\/p>\n<\/div>\n<\/div>\n<\/section>\n

<\/p>\n

\n
\n
\n<\/div>\n
\n
\n

Prvn\u00ed doporu\u010den\u00ed, je\u0161t\u011b p\u0159ed zve\u0159ejn\u011bn\u00edm podrobnost\u00ed o zranitelnosti bylo, aby u\u017eivatel\u00e9 odinstalovali nebo alespo\u0148 deaktivovali roz\u0161\u00ed\u0159en\u00ed pro \u0161ifrov\u00e1n\u00ed v emailov\u00fdch klientech\u200a\u2014\u200aEnigmail, GPGTools a Gpg4win. Na soci\u00e1ln\u00edch s\u00edt\u00edch se rozjela lavina p\u0159\u00edsp\u011bvk\u016f o tom, jak je PGP\/GPG nebezpe\u010dn\u00e9 a u\u017eivatel\u00e9 by m\u011bli p\u0159ej\u00edt na jin\u00e9 zp\u016fsoby komunikace. Nej\u010dast\u011bji byl zmi\u0148ov\u00e1n Signal<\/strong><\/a> messenger<\/strong>. Co\u017e o to, Signal je opravdu pova\u017eov\u00e1n za jeden z nejbezpe\u010dn\u011bj\u0161\u00edch zp\u016fsob\u016f komunikace po Internetu (pouze p\u0159i pou\u017eit\u00ed mobiln\u00edch aplikac\u00ed, v desktopov\u00fdch verz\u00edch byly ned\u00e1vno nalezeny zranitelnosti<\/a>), ale email j\u00edm lze t\u011b\u017eko nahradit. Signal je aplikace pro pos\u00edl\u00e1n\u00ed kr\u00e1tk\u00fdch zpr\u00e1v, je to bezpe\u010dn\u00e1 alternativa k sms nebo Facebook Messengeru. Ale nahradit j\u00edm pln\u011b email dost dob\u0159e nejde.<\/p>\n

Z\u00e1rove\u0148 se uk\u00e1zalo, \u017ee p\u0159i dodr\u017eov\u00e1n\u00ed jist\u00fdch pravidel lze i nad\u00e1le bezpe\u010dn\u011b komunikovat s pou\u017eit\u00edm zm\u00edn\u011bn\u00fdch plugin\u016f (pokud p\u0159ipust\u00edme mo\u017enost, \u017ee n\u011bco jako bezpe\u010dn\u00e1 komunikace na Internetu existuje). O t\u011bchto pravidlech v\u00edce na konci \u010dl\u00e1nku.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\n
\n
\n<\/div>\n
\n
\n

\u00datoky<\/h3>\n

Zve\u0159ejn\u011bn\u00e9 dokumenty popisuj\u00ed dva druhy \u00fatok\u016f, ve zkratce a zjednodu\u0161en\u011b se daj\u00ed popsat takto:<\/p>\n

1. \u201cDirect exfiltration\u201d, kter\u00fd vyu\u017e\u00edv\u00e1 zp\u016fsobu, jak\u00fdm emailov\u00fd klient zpracov\u00e1v\u00e1 zpr\u00e1vy v HTML form\u00e1tu a jak je zobrazuje u\u017eivateli.
\nPokud \u00fato\u010dn\u00edk z\u00edsk\u00e1 za\u0161ifrovanou zpr\u00e1vu, kter\u00e1 ho zaj\u00edm\u00e1, po\u0161le ob\u011bti email, kter\u00fd obsahuje i onu d\u0159\u00edve za\u0161ifrovanou zpr\u00e1vu. Emailov\u00fd klient u\u017eivateli automaticky zobraz\u00ed email cel\u00fd, v\u010detn\u011b jeho vlastn\u00ed, p\u016fvodn\u011b za\u0161ifrovan\u00e9 zpr\u00e1vy. Za\u010d\u00e1tek emailu pak obsahuje k\u00f3d (neukon\u010den\u00fd HTML tag img src=\"\u201dhttp:\/\/efail.de\/\"<\/code> )<\/p>\n

<\/figure>\n

2. Druh\u00fd \u00fatok (The CBC\/CFB Gadget Attack) umo\u017e\u0148uje zm\u011bnit za\u0161ifrovanou zpr\u00e1vu. \u00dato\u010dn\u00edk ji tak sice nen\u00ed schopen p\u0159e\u010d\u00edst, ale je schopen j\u00ed zm\u011bnit a poslat adres\u00e1tovi vlastn\u00ed verzi emailu. Standard OpenPGP explicitn\u011b nevy\u017eaduje kontrolu integrity zpr\u00e1vy (kontrola toho, zda nebyla zpr\u00e1va \u201cpo cest\u011b\u201d zm\u011bn\u011bna) a nav\u00edc i kdy\u017e je zpr\u00e1va odesl\u00e1na s touto pojistkou, existuj\u00ed zp\u016fsoby, jak ji odstranit a n\u011bkte\u0159\u00ed emailov\u00fd klienti sice u\u017eivatele upozorn\u00ed, \u017ee testem na integritu zpr\u00e1va nepro\u0161la (a tud\u00ed\u017e byla zm\u011bn\u011bna), ale zpr\u00e1vu p\u0159esto zobraz\u00ed. Pak se opakuje sc\u00e9n\u00e1\u0159 prvn\u00edho \u00fatoku\u200a\u2014\u200azobrazen\u00e1 zpr\u00e1va je zasl\u00e1na na server \u00fato\u010dn\u00edka.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

\n
\n
\n<\/div>\n
\n
\n

Jak ochr\u00e1nit svoji komunikaci?<\/h3>\n
    \n
  1. Zak\u00e1zat zobrazen\u00ed vzd\u00e1len\u00e9ho obsahu (nap\u0159. v Thunderbirdu je to p\u0159ednastaveno). Emailov\u00fd klient tak nebude zas\u00edlat po\u017eadavek na \u00fato\u010dn\u00edk\u016fv server.<\/li>\n
  2. Vypnout zobrazov\u00e1n\u00ed a vytv\u00e1\u0159en\u00ed zpr\u00e1v v HTML form\u00e1tu. Zpr\u00e1va se pak bude zobrazovat jako oby\u010dejn\u00fd text a nebudou se zpracov\u00e1vat jak\u00e9koliv k\u00f3dy.<\/li>\n<\/ol>\n
    \n

    \"\"
    Nastaven\u00ed zobrazen\u00ed v Thunderbirdu<\/figcaption><\/figure><\/figure>\n

    Dal\u0161\u00ed mo\u017enost\u00ed je pou\u017e\u00edvat defaultn\u011b \u0161ifrovan\u00fd ProtonMail<\/a>. Ten pou\u017e\u00edv\u00e1 PGP jako z\u00e1klad a nen\u00ed objeven\u00fdmi zranitelnostmi zasa\u017een.<\/p>\n

    A zku\u0161en\u011bj\u0161\u00ed u\u017eivatel\u00e9 mohou pou\u017e\u00edt pro (de)\u0161ifrov\u00e1n\u00ed zpr\u00e1v shell\/p\u0159\u00edkazovou \u0159\u00e1dku. N\u00e1vod nap\u0159. zde: Linux<\/a>, MacOS<\/a>, Windows<\/a>.<\/p>\n<\/div>\n<\/div>\n<\/section>\n

    \n
    \n
    \n<\/div>\n
    \n
    \n

    Z\u00e1v\u011brem je pot\u0159eba dodat, \u017ee zp\u016fsob, jak\u00fdm byly ony zranitelnosti komunikov\u00e1ny ve\u0159ejnosti, byl pon\u011bkud ne\u0161\u0165astn\u00fd (dal by se ozna\u010dit sp\u00ed\u0161e jako bulv\u00e1rn\u00ed). Prvn\u00ed zpr\u00e1vy navozovaly dojem, \u017ee PGP\/GPG bylo prolomeno a m\u011blo by se p\u0159estat okam\u017eit\u011b pou\u017e\u00edvat. PGP je tu s n\u00e1mi p\u0159ibli\u017en\u011b 20 let a zat\u00edm se nikomu nepoda\u0159ilo jeho bezpe\u010dnost naru\u0161it. St\u00e1t se to samoz\u0159ejm\u011b m\u016f\u017ee, ale v \u017e\u00e1dn\u00e9m p\u0159\u00edpad\u011b se to nestalo nyn\u00ed.<\/p>\n

    Nen\u00ed tedy d\u016fvod k panice, \u0161ifrujme\u00a0\ud83d\ude42<\/p>\n<\/div>\n<\/div>\n<\/section>\n","protected":false},"excerpt":{"rendered":"

    Tl;dr? Nep\u0159estalo! V \u00fater\u00fd, 15. 5. 2018 byl na webu https:\/\/efail.de zve\u0159ejn\u011bn podrobn\u00fd popis zranitelnost\u00ed v implementac\u00edch PGP\/GPG v roz\u0161\u00ed\u0159en\u00edch emailov\u00fdch klient\u016f. Jedn\u00e1 se o zneu\u017eit\u00ed zp\u016fsobu, jak\u00fdm dan\u00e1 roz\u0161\u00ed\u0159en\u00ed pracuj\u00ed se zpr\u00e1vami. To je d\u016fle\u017eit\u00e1 zpr\u00e1va. Zp\u016fsob \u0161ifrov\u00e1n\u00ed jako takov\u00fd prolomen nebyl, tud\u00ed\u017e lze i nad\u00e1le pova\u017eovat PGP\/GPG za bezpe\u010dn\u00e9!<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_vp_format_video_url":"","_vp_image_focal_point":[],"footnotes":""},"categories":[1],"tags":[4,6,5,7],"class_list":["post-151","post","type-post","status-publish","format-standard","hentry","category-blog","tag-efail","tag-gpg","tag-pgp","tag-sifrovani"],"translation":{"provider":"WPGlobus","version":"3.0.2","language":"en","enabled_languages":["cs","en"],"languages":{"cs":{"title":true,"content":true,"excerpt":false},"en":{"title":false,"content":false,"excerpt":false}}},"yoast_head":"\nP\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9? - DIGITAL SELF-DEFENSE<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.digitalnisebeobrana.cz\/blog\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9? - DIGITAL SELF-DEFENSE\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.digitalnisebeobrana.cz\/blog\/\" \/>\n<meta property=\"og:site_name\" content=\"DIGITAL SELF-DEFENSE\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/digitalnisebeobrana\/\" \/>\n<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/digitalnisebeobrana\/\" \/>\n<meta property=\"article:published_time\" content=\"2018-05-20T16:30:18+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2018-06-20T09:08:02+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/cdn-images-1.medium.com\/max\/800\/0*wmK6hujxOQr-vTUO.\" \/>\n<meta name=\"author\" content=\"Milan\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@sodomak\" \/>\n<meta name=\"twitter:site\" content=\"@sodomak\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Milan\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/\"},\"author\":{\"name\":\"Milan\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#\\\/schema\\\/person\\\/e932432719ebfc02a9b05e7b12047736\"},\"headline\":\"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\\\/GPG bezpe\u010dn\u00e9?\",\"datePublished\":\"2018-05-20T16:30:18+00:00\",\"dateModified\":\"2018-06-20T09:08:02+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/\"},\"wordCount\":752,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#\\\/schema\\\/person\\\/e932432719ebfc02a9b05e7b12047736\"},\"image\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cdn-images-1.medium.com\\\/max\\\/800\\\/0*wmK6hujxOQr-vTUO.\",\"keywords\":[\"efail\",\"gpg\",\"pgp\",\"\u0161ifrov\u00e1n\u00ed\"],\"articleSection\":[\"Blog\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/\",\"url\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/\",\"name\":\"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\\\/GPG bezpe\u010dn\u00e9? - DIGITAL SELF-DEFENSE\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/cdn-images-1.medium.com\\\/max\\\/800\\\/0*wmK6hujxOQr-vTUO.\",\"datePublished\":\"2018-05-20T16:30:18+00:00\",\"dateModified\":\"2018-06-20T09:08:02+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#primaryimage\",\"url\":\"https:\\\/\\\/cdn-images-1.medium.com\\\/max\\\/800\\\/0*wmK6hujxOQr-vTUO.\",\"contentUrl\":\"https:\\\/\\\/cdn-images-1.medium.com\\\/max\\\/800\\\/0*wmK6hujxOQr-vTUO.\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/blog\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\\\/GPG bezpe\u010dn\u00e9?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#website\",\"url\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/\",\"name\":\"DIGITAL SELF-DEFENSE\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#\\\/schema\\\/person\\\/e932432719ebfc02a9b05e7b12047736\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":[\"Person\",\"Organization\"],\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#\\\/schema\\\/person\\\/e932432719ebfc02a9b05e7b12047736\",\"name\":\"Milan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/logo.png\",\"url\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/logo.png\",\"width\":613,\"height\":73,\"caption\":\"Milan\"},\"logo\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/wp-content\\\/uploads\\\/2022\\\/01\\\/logo.png\"},\"description\":\"Jmenuji se Milan P\u016flkr\u00e1bek, pamatuji si po\u010d\u00edta\u010de bez internetu, Internet bez Google a mobiln\u00ed komunikaci bez \u0161ifrov\u00e1n\u00ed. M\u00e1m za sebou v\u00edce ne\u017e dvacet let profesion\u00e1ln\u00ed praxe v IT, p\u0159edn\u00e1\u0161\u00edm a p\u00ed\u0161u \u010dl\u00e1nky o IT bezpe\u010dnosti, kryptom\u011bn\u00e1ch a nov\u00fdch technologi\u00edch. Od roku 2014 jsem sou\u010d\u00e1st\u00ed nezikov\u00e9 organizace Paraleln\u00ed Polis v Praze.\",\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/digitalnisebeobrana\\\/\",\"https:\\\/\\\/x.com\\\/sodomak\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9? - DIGITAL SELF-DEFENSE","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.digitalnisebeobrana.cz\/blog\/","og_locale":"en_US","og_type":"article","og_title":"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9? - DIGITAL SELF-DEFENSE","og_url":"https:\/\/www.digitalnisebeobrana.cz\/blog\/","og_site_name":"DIGITAL SELF-DEFENSE","article_publisher":"https:\/\/www.facebook.com\/digitalnisebeobrana\/","article_author":"https:\/\/www.facebook.com\/digitalnisebeobrana\/","article_published_time":"2018-05-20T16:30:18+00:00","article_modified_time":"2018-06-20T09:08:02+00:00","og_image":[{"url":"https:\/\/cdn-images-1.medium.com\/max\/800\/0*wmK6hujxOQr-vTUO.","type":"","width":"","height":""}],"author":"Milan","twitter_card":"summary_large_image","twitter_creator":"@sodomak","twitter_site":"@sodomak","twitter_misc":{"Written by":"Milan","Est. reading time":"4 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#article","isPartOf":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/"},"author":{"name":"Milan","@id":"https:\/\/www.digitalnisebeobrana.cz\/en\/#\/schema\/person\/e932432719ebfc02a9b05e7b12047736"},"headline":"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9?","datePublished":"2018-05-20T16:30:18+00:00","dateModified":"2018-06-20T09:08:02+00:00","mainEntityOfPage":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/"},"wordCount":752,"commentCount":0,"publisher":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/en\/#\/schema\/person\/e932432719ebfc02a9b05e7b12047736"},"image":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#primaryimage"},"thumbnailUrl":"https:\/\/cdn-images-1.medium.com\/max\/800\/0*wmK6hujxOQr-vTUO.","keywords":["efail","gpg","pgp","\u0161ifrov\u00e1n\u00ed"],"articleSection":["Blog"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/www.digitalnisebeobrana.cz\/blog\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/","url":"https:\/\/www.digitalnisebeobrana.cz\/blog\/","name":"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9? - DIGITAL SELF-DEFENSE","isPartOf":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/en\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#primaryimage"},"image":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#primaryimage"},"thumbnailUrl":"https:\/\/cdn-images-1.medium.com\/max\/800\/0*wmK6hujxOQr-vTUO.","datePublished":"2018-05-20T16:30:18+00:00","dateModified":"2018-06-20T09:08:02+00:00","breadcrumb":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.digitalnisebeobrana.cz\/blog\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#primaryimage","url":"https:\/\/cdn-images-1.medium.com\/max\/800\/0*wmK6hujxOQr-vTUO.","contentUrl":"https:\/\/cdn-images-1.medium.com\/max\/800\/0*wmK6hujxOQr-vTUO."},{"@type":"BreadcrumbList","@id":"https:\/\/www.digitalnisebeobrana.cz\/blog\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.digitalnisebeobrana.cz\/en\/"},{"@type":"ListItem","position":2,"name":"P\u0159estalo b\u00fdt \u0161ifrov\u00e1n\u00ed email\u016f pomoc\u00ed PGP\/GPG bezpe\u010dn\u00e9?"}]},{"@type":"WebSite","@id":"https:\/\/www.digitalnisebeobrana.cz\/en\/#website","url":"https:\/\/www.digitalnisebeobrana.cz\/en\/","name":"DIGITAL SELF-DEFENSE","description":"","publisher":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/en\/#\/schema\/person\/e932432719ebfc02a9b05e7b12047736"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.digitalnisebeobrana.cz\/en\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":["Person","Organization"],"@id":"https:\/\/www.digitalnisebeobrana.cz\/en\/#\/schema\/person\/e932432719ebfc02a9b05e7b12047736","name":"Milan","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.digitalnisebeobrana.cz\/wp-content\/uploads\/2022\/01\/logo.png","url":"https:\/\/www.digitalnisebeobrana.cz\/wp-content\/uploads\/2022\/01\/logo.png","contentUrl":"https:\/\/www.digitalnisebeobrana.cz\/wp-content\/uploads\/2022\/01\/logo.png","width":613,"height":73,"caption":"Milan"},"logo":{"@id":"https:\/\/www.digitalnisebeobrana.cz\/wp-content\/uploads\/2022\/01\/logo.png"},"description":"Jmenuji se Milan P\u016flkr\u00e1bek, pamatuji si po\u010d\u00edta\u010de bez internetu, Internet bez Google a mobiln\u00ed komunikaci bez \u0161ifrov\u00e1n\u00ed. M\u00e1m za sebou v\u00edce ne\u017e dvacet let profesion\u00e1ln\u00ed praxe v IT, p\u0159edn\u00e1\u0161\u00edm a p\u00ed\u0161u \u010dl\u00e1nky o IT bezpe\u010dnosti, kryptom\u011bn\u00e1ch a nov\u00fdch technologi\u00edch. Od roku 2014 jsem sou\u010d\u00e1st\u00ed nezikov\u00e9 organizace Paraleln\u00ed Polis v Praze.","sameAs":["https:\/\/www.facebook.com\/digitalnisebeobrana\/","https:\/\/x.com\/sodomak"]}]}},"_links":{"self":[{"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/posts\/151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/comments?post=151"}],"version-history":[{"count":11,"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/posts\/151\/revisions"}],"predecessor-version":[{"id":358,"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/posts\/151\/revisions\/358"}],"wp:attachment":[{"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/media?parent=151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/categories?post=151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.digitalnisebeobrana.cz\/en\/wp-json\/wp\/v2\/tags?post=151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}