{"id":3547,"date":"2011-09-15T14:44:16","date_gmt":"2011-09-15T14:44:16","guid":{"rendered":"https:\/\/www.techopedia.com\/definition\/kerberos\/"},"modified":"2017-01-17T17:19:51","modified_gmt":"2017-01-17T17:19:51","slug":"kerberos","status":"publish","type":"definition","link":"https:\/\/www.techopedia.com\/definition\/3996\/kerberos","title":{"rendered":"Kerberos"},"content":{"rendered":"<h2><span id=\"what_does_kerberos_mean\">What Does Kerberos Mean?<\/span><\/h2>\n<p>Kerberos is a network protocol that uses secret-key cryptography to authenticate client-server applications. Kerberos requests an encrypted ticket via an authenticated server sequence to use services.<\/p>\n<p>The protocol gets its name from the three-headed dog (Kerberos, or Cerberus) that guarded the gates of Hades in Greek mythology.\n<\/p>\n<h2><span id=\"techopedia_explains_kerberos\">Techopedia Explains Kerberos<\/span><\/h2>\n<p>Kerberos was developed by Project Athena &#8211; a joint project between the Massachusetts Institute of Technology (MIT), Digital Equipment Corporation and IBM that ran between 1983 and 1991.<\/p>\n<p>An authentication server uses a Kerberos ticket to grant server access and then creates a session key based on the requester\u2019s password and another randomized value. The ticket-granting ticket (TGT) is sent to the ticket-granting server (TGS), which is required to use the same authentication server.<\/p>\n<p>The requester receives an encrypted TGS key with a time stamp and service ticket, which is returned to the requester and decrypted. The requester sends the TGS this information and forwards the encrypted key to the server to obtain the desired service. If all actions are handled correctly, the server accepts the ticket and performs the desired user service, which must decrypt the key, verify the timestamp and contact the distribution center to obtain session keys. This session key is sent to the requester, which decrypts the ticket. <\/p>\n<p>If the keys and timestamp are valid, client-server communication continues. The TGS ticket is time stamped, which allows concurrent requests within the allotted time frame.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>What Does Kerberos Mean? Kerberos is a network protocol that uses secret-key cryptography to authenticate client-server applications. Kerberos requests an encrypted ticket via an authenticated server sequence to use services. The protocol gets its name from the three-headed dog (Kerberos, or Cerberus) that guarded the gates of Hades in Greek mythology. Techopedia Explains Kerberos Kerberos [&hellip;]<\/p>\n","protected":false},"author":7813,"featured_media":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_lmt_disableupdate":"","_lmt_disable":"","om_disable_all_campaigns":false,"footnotes":""},"definitioncat":[219],"class_list":["post-3547","definition","type-definition","status-publish","format-standard","hentry","definitioncat-networks"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Kerberos? - Definition from Techopedia<\/title>\n<meta name=\"description\" content=\"This definition explains the meaning of Kerberos and why it matters.\" \/>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kerberos\" \/>\n<meta property=\"og:description\" content=\"This definition explains the meaning of Kerberos and why it matters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos\" \/>\n<meta property=\"og:site_name\" content=\"Techopedia\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/techopedia\/\" \/>\n<meta property=\"article:modified_time\" content=\"2017-01-17T17:19:51+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@techopedia\" \/>\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\":\"Article\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos\"},\"author\":{\"name\":\"Margaret Rouse\",\"@id\":\"https:\/\/www.techopedia.com\/#\/schema\/person\/f5dd538e31ee352d105b8af36c4268a5\"},\"headline\":\"Kerberos\",\"datePublished\":\"2011-09-15T14:44:16+00:00\",\"dateModified\":\"2017-01-17T17:19:51+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos\"},\"wordCount\":241,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.techopedia.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos#respond\"]}],\"articleSection\":\"\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos\",\"url\":\"https:\/\/www.techopedia.com\/definition\/3996\/kerberos\",\"name\":\"What is Kerberos? 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