{"id":10712,"date":"2011-06-14T00:00:00","date_gmt":"2011-06-14T00:00:00","guid":{"rendered":"https:\/\/www.techopedia.com\/definition\/internet-protocol-security\/"},"modified":"2016-12-28T17:50:46","modified_gmt":"2016-12-28T17:50:46","slug":"internet-protocol-security","status":"publish","type":"definition","link":"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec","title":{"rendered":"Internet Protocol Security"},"content":{"rendered":"<h2><span id=\"what_does_internet_protocol_security_mean\">What Does Internet Protocol Security Mean?<\/span><\/h2>\n<p>Internet protocol security (IPsec) is a set of protocols that provides security for Internet Protocol. It can use cryptography to provide security. IPsec can be used for the setting up of virtual private networks (VPNs) in a secure manner.<\/p>\n<p>Also known as IP Security.<\/p>\n<h2><span id=\"techopedia_explains_internet_protocol_security\">Techopedia Explains Internet Protocol Security<\/span><\/h2>\n<p>IPsec involves two security services:<\/p>\n<ul>\n<li>Authentication Header (AH): This authenticates the sender and it discovers any changes in data during transmission.<\/li>\n<li>Encapsulating Security Payload (ESP): This not only performs authentication for the sender but also encrypts the data being sent.<\/li>\n<\/ul>\n<p>There are two modes of IPsec:<\/p>\n<ul>\n<li>Tunnel Mode: This will take the whole IP packet to form secure communication between two places, or gateways.<\/li>\n<li>Transport Mode: This only encapsulates the IP payload (not the entire IP packet as in tunnel mode) to ensure a secure channel of communication.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>What Does Internet Protocol Security Mean? Internet protocol security (IPsec) is a set of protocols that provides security for Internet Protocol. It can use cryptography to provide security. IPsec can be used for the setting up of virtual private networks (VPNs) in a secure manner. Also known as IP Security. Techopedia Explains Internet Protocol Security [&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":[218,245,219],"class_list":["post-10712","definition","type-definition","status-publish","format-standard","hentry","definitioncat-cybersecurity","definitioncat-internet","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 IPsec? - Definition from Techopedia<\/title>\n<meta name=\"description\" content=\"This definition explains the meaning of Internet Protocol Security 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=\"Internet Protocol Security\" \/>\n<meta property=\"og:description\" content=\"This definition explains the meaning of Internet Protocol Security and why it matters.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec\" \/>\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=\"2016-12-28T17:50:46+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\/24842\/internet-protocol-security-ipsec#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec\"},\"author\":{\"name\":\"Margaret Rouse\",\"@id\":\"https:\/\/www.techopedia.com\/#\/schema\/person\/f5dd538e31ee352d105b8af36c4268a5\"},\"headline\":\"Internet Protocol Security\",\"datePublished\":\"2011-06-14T00:00:00+00:00\",\"dateModified\":\"2016-12-28T17:50:46+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec\"},\"wordCount\":146,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.techopedia.com\/#organization\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec#respond\"]}],\"articleSection\":\"\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec\",\"url\":\"https:\/\/www.techopedia.com\/definition\/24842\/internet-protocol-security-ipsec\",\"name\":\"What is IPsec? 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