{"id":24646,"date":"2025-10-01T07:00:26","date_gmt":"2025-10-01T12:00:26","guid":{"rendered":"https:\/\/www.firewalls.com\/blog\/?p=24646"},"modified":"2025-10-13T11:31:10","modified_gmt":"2025-10-13T16:31:10","slug":"tls-1-2-vs-tls-1-3","status":"publish","type":"post","link":"https:\/\/www.firewalls.com\/blog\/tls-1-2-vs-tls-1-3\/","title":{"rendered":"TLS 1.2 vs TLS 1.3: Understanding Advancements in Transport Layer Security"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"24646\" class=\"elementor elementor-24646\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-fb635e7 e-flex e-con-boxed e-con e-parent\" data-id=\"fb635e7\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5a73ff0 elementor-widget elementor-widget-text-editor\" data-id=\"5a73ff0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">For those who aren\u2019t already familiar, Transport Layer Security (TLS) works to secure data transmitted over the internet. That\u2019s the short version, but it also delivers HTTPS encryption, as well as authentication. An evolution from <\/span><a href=\"https:\/\/www.firewalls.com\/blog\/what-is-an-ssl-vpn\/\"><span style=\"font-weight: 400;\">Secure Socket Layer (SSL)<\/span><\/a><span style=\"font-weight: 400;\">, it\u2019s important to understand the differences in TLS 1.2 vs TLS 1.3.<\/span><\/p><p><span style=\"font-weight: 400;\">You might get varying opinions on this from people in the industry, but both of these TLS versions are actively in use. The question comes down to which one you should focus on, and this in itself comes with several angles to review. In this article, you\u2019ll get an easily digestible understanding of TLS 1.2 vs TLS 1.3, guiding you to what works best for your operational demands.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b07bca7 elementor-widget elementor-widget-heading\" data-id=\"b07bca7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">The Need to Know On TLS 1.2 vs TLS 1.3\n<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9a17e0d elementor-widget elementor-widget-text-editor\" data-id=\"9a17e0d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Before you dive into the specifics of each version, it\u2019s helpful to understand the two main protocols that TLS relies on. There\u2019s the Transport Layer Security Handshake Protocol, which focuses on authentication and key exchange. With the Record Protocol, the core focus is on securing actual data transfer.<\/span><\/p><p><span style=\"font-weight: 400;\">Looking at TLS 1.2, its popularity is found in reliability and enterprise compatibility. However, another truth to this is that it uses older cryptographic algorithms. With TLS 1.3, you can find several improvements, from faster TLS handshakes to stronger data encryption solutions, and more.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e3400c6 elementor-widget elementor-widget-heading\" data-id=\"e3400c6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Transport Layer Security 1.2?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-efca0cc elementor-widget elementor-widget-text-editor\" data-id=\"efca0cc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">This version of TLS uses what\u2019s called a 2-round-trip handshake. Breaking this down a little further, it requires multiple message exchanges between the client and server to establish a connection that\u2019s secure.<\/span><\/p><p><span style=\"font-weight: 400;\">Aside from that, here are a few other unique details about TLS 1.2:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Slower TLS handshake<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Less secure cipher suites<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">A single handshake requires exchanging 5 to 7 packets<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Supports over a hundred combinations of cryptographic algorithms<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Comparatively less reliable in web performance and user experience<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">It\u2019s understandable if this makes you wonder how TLS services under 1.3 compare. While you\u2019ll find a few shared similarities, it\u2019s essential to navigate what sets them apart.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d412666 elementor-widget elementor-widget-heading\" data-id=\"d412666\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What is Transport Layer Security 1.3?\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3d46991 elementor-widget elementor-widget-text-editor\" data-id=\"3d46991\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">The newer version of TLS brings the handshake down to a single round trip. Inevitably, making it faster than 1.2, this is made possible by reducing the back-and-forth messages between the client and the server.<\/span><\/p><p><span style=\"font-weight: 400;\">Here\u2019s how TLS 1.3 compares at a glance:<\/span><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Faster TLS handshake<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">More secure cipher suites<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Handshake generally only requires exchanging 0 to 3 packets<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Supports Authenticated Encryption with Associated Data (AEAD)<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Improved web performance and user experience<\/span><\/li><\/ul><p><span style=\"font-weight: 400;\">It might seem like <\/span><a href=\"https:\/\/www.firewalls.com\/catalogsearch\/result\/?q=TLS%201.3\"><span style=\"font-weight: 400;\">TLS 1.3 is the obvious choice<\/span><\/a><span style=\"font-weight: 400;\"> across the board, and in many circumstances, it is, without a doubt. On the other hand, TLS 1.2 is still in use, as both versions can help deliver on the balanced security organizations are looking for. Nevertheless, it\u2019s still vital to make sure you don\u2019t get their capabilities mixed up in the process of your decision-making.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4caef0d elementor-widget elementor-widget-heading\" data-id=\"4caef0d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">A Side-by-Side of TLS 1.2 vs TLS 1.3\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-586e805 elementor-widget elementor-widget-text-editor\" data-id=\"586e805\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">As with many other cybersecurity topics, it can all get pretty technical. The table below provides an easy comparison you can reference to help gain a technical understanding from a simplified point of view.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b3a4528 elementor-widget elementor-widget-shortcode\" data-id=\"b3a4528\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"shortcode.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-shortcode\">\n<table id=\"tablepress-90\" class=\"tablepress tablepress-id-90\">\n<thead>\n<tr class=\"row-1\">\n\t<th class=\"column-1\">Feature<\/th><th class=\"column-2\">TLS 1.2<\/th><th class=\"column-3\">TLS 1.3<\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-striping row-hover\">\n<tr class=\"row-2\">\n\t<td class=\"column-1\">Version Control<\/td><td class=\"column-2\">Allows version negotiation, but is susceptible to downgrade attacks<\/td><td class=\"column-3\">Negotiation is much simpler<\/td>\n<\/tr>\n<tr class=\"row-3\">\n\t<td class=\"column-1\">Encryption Algorithms<\/td><td class=\"column-2\">Supports numerous algorithms, including weaker and legacy options<\/td><td class=\"column-3\">Focuses on the support of AEAD algorithms for much stronger security<\/td>\n<\/tr>\n<tr class=\"row-4\">\n\t<td class=\"column-1\">Digital Signature<\/td><td class=\"column-2\">Utilizes various cipher suites, but selection depends on client-server compatibility<\/td><td class=\"column-3\">Faster and more secure, emphasizing ECDSA and RSASSA-PSS with smaller key sizes<\/td>\n<\/tr>\n<tr class=\"row-5\">\n\t<td class=\"column-1\">Compression<\/td><td class=\"column-2\">Compression is supported and negotiates supported methods via Client Hello<\/td><td class=\"column-3\">Compression is disabled, sending a null byte to eliminate compression-related attacks<\/td>\n<\/tr>\n<tr class=\"row-6\">\n\t<td class=\"column-1\">Handshake Latency<\/td><td class=\"column-2\">Requires 2 round trips<\/td><td class=\"column-3\">Requires only 1 round trip<\/td>\n<\/tr>\n<tr class=\"row-7\">\n\t<td class=\"column-1\">Computational Overhead<\/td><td class=\"column-2\">Higher, and includes multiple cryptographic options and separate key exchange methods<\/td><td class=\"column-3\">Lower, simplifies its process with streamlined cipher suites<\/td>\n<\/tr>\n<tr class=\"row-8\">\n\t<td class=\"column-1\">Overall Performance<\/td><td class=\"column-2\">Slower handshake with more overhead<\/td><td class=\"column-3\">Improvements with speed, reduced latency, and better overall efficiency<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<!-- #tablepress-90 from cache --><\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d009160 elementor-widget elementor-widget-text-editor\" data-id=\"d009160\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">While it\u2019s pretty clear TLS 1.3 comes out on top in several areas, it isn\u2019t your only choice here. It\u2019s simple, TLS 1.2 is a jump from 1.1, and TLS 1.3 is a leap from 1.2. These are all important factors to take into account when it comes to the technicalities of <\/span><a href=\"https:\/\/www.firewalls.com\/blog\/top-5-network-security-solutions\/\"><span style=\"font-weight: 400;\">business network security<\/span><\/a><span style=\"font-weight: 400;\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-896213f elementor-widget elementor-widget-heading\" data-id=\"896213f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Final Thoughts\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f5e240c elementor-widget elementor-widget-text-editor\" data-id=\"f5e240c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Don\u2019t get it wrong, TLS 1.2 is still being used in today\u2019s world, especially when it comes to legacy and enterprise-level environments. Many systems actively support both versions of TLS, but 1.3 does well to eliminate issues with outdated features.<\/span><\/p><p><span style=\"font-weight: 400;\">Your choice between the two primarily comes down to the needs of your current infrastructure. As always, the Firewalls team is here if you\u2019d like some assistance with narrowing down your decision-making. 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