{"id":5039,"date":"2026-06-01T12:38:00","date_gmt":"2026-06-01T10:38:00","guid":{"rendered":"https:\/\/www.digitalnisebeobrana.cz\/?post_type=glossary&p=5039"},"modified":"2026-06-01T12:38:00","modified_gmt":"2026-06-01T10:38:00","slug":"kerckhoffsuv-princip","status":"publish","type":"glossary","link":"https:\/\/www.digitalnisebeobrana.cz\/en\/glossary\/kerckhoffsuv-princip\/","title":{"rendered":"Kerckhoffs\u2019s principle"},"content":{"rendered":"

Kerckhoffs\u2019s principle says that an encryption system should remain secure even when its design is public. The key should be secret, not the whole algorithm. In debates about government or unpublished ciphers, this is an important test of trust.<\/p>\n","protected":false},"excerpt":{"rendered":"

The principle that encryption security should rely on the secrecy of the key, not the secrecy of the algorithm.<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"template":"","glossary-cat":[],"class_list":["post-5039","glossary","type-glossary","status-publish","hentry"],"translation":{"provider":"WPGlobus","version":"3.0.5","language":"en","enabled_languages":["cs","en"],"languages":{"cs":{"title":true,"content":true,"excerpt":true},"en":{"title":true,"content":true,"excerpt":true}}},"yoast_head":"\nKerckhoffs\u2019s principle - 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\/glossary\/kerckhoffsuv-princip\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kerckhoffs\u2019s principle - DIGITAL SELF-DEFENSE\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.digitalnisebeobrana.cz\/glossary\/kerckhoffsuv-princip\/\" \/>\n<meta property=\"og:site_name\" content=\"DIGITAL SELF-DEFENSE\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/digitalnisebeobrana\/\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@sodomak\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/glossary\\\/kerckhoffsuv-princip\\\/\",\"url\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/glossary\\\/kerckhoffsuv-princip\\\/\",\"name\":\"Kerckhoffs\u2019s principle - DIGITAL SELF-DEFENSE\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/en\\\/#website\"},\"datePublished\":\"2026-06-01T10:38:00+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/glossary\\\/kerckhoffsuv-princip\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/glossary\\\/kerckhoffsuv-princip\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/glossary\\\/kerckhoffsuv-princip\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Glossary\",\"item\":\"https:\\\/\\\/www.digitalnisebeobrana.cz\\\/glossary\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Kerckhoffs\u2019s principle\"}]},{\"@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. 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