{"id":7342,"date":"2019-08-05T23:15:54","date_gmt":"2019-08-06T06:15:54","guid":{"rendered":"https:\/\/www.couchbase.com\/blog\/?p=7342"},"modified":"2025-06-13T19:26:47","modified_gmt":"2025-06-14T02:26:47","slug":"cipher-suites-in-couchbase-6-5","status":"publish","type":"post","link":"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/","title":{"rendered":"Cipher Suites in Couchbase Server 6.5"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">For many, \u201cCryptography\u201d is the little green lock icon next to the web address of their favorite websites, and for others, they might recall the TLS vulnerabilities that have hit in recent years. <\/span><span style=\"font-weight: 400;\">Data is today\u2019s digital gold, and in the quest to steal critical data, hackers are coming up with clever ways of stealing information. <\/span><span style=\"font-weight: 400;\">With the ever changing attack landscape in mind, Couchbase Server 6.5 adds a new way to easily configure the server cipher suites. In this blog, we\u2019ll go over the basics of ciphers and explain how you can configure Couchbase to use the latest and greatest ciphers.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/p>\n<h4><span style=\"font-weight: 400;\"><br \/>\n<\/span><strong>Basics of TLS Cipher Suites<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">A cipher suite is basically a complete set of methods (also known as algorithms) needed to secure a network connection through TLS (Transport Layer Security). Each cipher suite has its own distinct notation as shown below &#8211;<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384<\/b><b><br \/>\n<\/b><b><br \/>\n<\/b><span style=\"font-weight: 400;\">Now, let&#8217;s break that down-<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b>TLS<\/b><span style=\"font-weight: 400;\"> indicates that TLS protocol will be used to establish a secure communication. Remember that a protocol simply defines how the algorithms should be used.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>ECDHE<\/b><span style=\"font-weight: 400;\"> indicates that the Elliptic-Curve Diffie-Hellman will be leveraged for key exchange. This is how the keys will be exchanged between client and server for encrypting and decrypting data.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>ECDSA<\/b><span style=\"font-weight: 400;\"> is the algorithm, in this instance the Elliptic-Curve Digital Signature Algorithm, that is used to create a digital signature for authentication.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>AES_256_CBC<\/b><span style=\"font-weight: 400;\"> indicates that AES encryption with 256-bit key size will be leveraged to encrypt the message, and <\/span><b>CBC <\/b><span style=\"font-weight: 400;\">indicates that the mode will be cipher block chaining.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>SHA384<\/b><span style=\"font-weight: 400;\"> indicates that the hashing algorithm used for message verification (MAC) and in this example is SHA2 with a 384-bit key.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The TLS Handshake Protocol is responsible for the Cipher Suite negotiation between the client and server (see \u2018Server Hello\u2019), authentication of the server and optionally the client, and the secret key exchange (see green arrows below).<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-7443\" src=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/2019\/08\/cipher-suites-300x235.png\" alt=\"\" width=\"453\" height=\"355\" srcset=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/cipher-suites-300x235.png 300w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/cipher-suites-1024x802.png 1024w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/cipher-suites-768x602.png 768w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/cipher-suites-20x16.png 20w, https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/cipher-suites.png 1126w\" sizes=\"auto, (max-width: 453px) 100vw, 453px\" \/><\/p>\n<p><strong>Figure : Client-Server Interaction During TLS Handshake<\/strong><\/p>\n<h4><span style=\"font-weight: 400;\"><br \/>\n<\/span><strong>Setting Cipher Suites in Couchbase 6.5<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">By default (ie. without explicitly specifying the cipher suites), Couchbase Server picks the strongest common cipher between the client and the server. With Couchbase Server 6.5, you can tell Couchbase which Cipher suites to use. <\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">As shown in the example below, we set the cipher suites in Couchbase to use TLS_RSA_WITH_AES_128_CBC_SHA. This cipher suite is then used across all Couchbase Server services including data, query, index, full-text and analytics.<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><span style=\"font-weight: 400;\"># .\/couchbase-cli setting-security &#8211;cipher-suites TLS_RSA_WITH_AES_128_CBC_SHA -c localhost:8091 -u Administrator -p password &#8211;set<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">SUCCESS: Security settings updated<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400;\"># .\/couchbase-cli setting-security -c localhost:8091 -u Administrator -p password &#8211;get<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><i><span style=\"font-weight: 400;\">{&#8220;disableUIOverHttp&#8221;: false, &#8220;disableUIOverHttps&#8221;: false, &#8220;cipherSuites&#8221;: [&#8220;TLS_RSA_WITH_AES_128_CBC_SHA&#8221;], &#8220;tlsMinVersion&#8221;: &#8220;tlsv1.2&#8221;, &#8220;honorCipherOrder&#8221;: true}<\/span><\/i><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4><strong>Verifying Cipher Usage<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">To verify that the cipher is used, we can connect to any of the <\/span><a href=\"https:\/\/docs.couchbase.com\/server\/current\/install\/install-ports.html\"><span style=\"font-weight: 400;\">SSL ports<\/span><\/a><span style=\"font-weight: 400;\"> in Couchbase. In the example below, we are connected to port 11207 (the data port over which Couchbase clients connect to the server).<\/span><\/p>\n<table>\n<tbody>\n<tr>\n<td><b>openssl s_client -connect localhost:11207<\/b><\/p>\n<p><span style=\"font-weight: 400;\">CONNECTED(00000003)<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Certificate chain<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a00 s:\/CN=127.0.0.1<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0i:\/CN=Couchbase Server de182d2a<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a01 s:\/CN=Couchbase Server de182d2a<\/span><\/p>\n<p><span style=\"font-weight: 400;\">\u00a0\u00a0\u00a0i:\/CN=Couchbase Server de182d2a<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Server certificate<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;&#8211;BEGIN CERTIFICATE&#8212;&#8211;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">MIIDADCCAeigAwIBAgIIFbB+nPd+hWIwDQYJKoZIhvcNAQELBQAwJDEiMCAGA1UE<\/span><\/p>\n<p><span style=\"font-weight: 400;\">AxMZQ291Y2hiYXNlIFNlcnZlciBkZTE4MmQyYTAeFw0xMzAxMDEwMDAwMDBaFw00<\/span><\/p>\n<p><span style=\"font-weight: 400;\">OTEyMzEyMzU5NTlaMBQxEjAQBgNVBAMTCTEyNy4wLjAuMTCCASIwDQYJKoZIhvcN<\/span><\/p>\n<p><span style=\"font-weight: 400;\">AQEBBQADggEPADCCAQoCggEBAL7PaNB0n1vxDsg6Z4ydBk7HjlEjzItIGVp6svgF<\/span><\/p>\n<p><span style=\"font-weight: 400;\">2A1XW98bIl34D6ZsWHsyj+i9+Xb3saY8HTD8f83QtUkGpve0AQGCHxFE1Dx0Eb2t<\/span><\/p>\n<p><span style=\"font-weight: 400;\">hMGwSWiL4DAiufa42UGmgJ008D70hpdQS1\/ow5wZ1kNmqmHdjzG2wGrdJEGFhwzS<\/span><\/p>\n<p><span style=\"font-weight: 400;\">lka+HdrDCaQIT6jvtnT3udO0R6yRFxjveEQ5lFX\/P4tZeyIWglTT0muRxcxI\/7Ln<\/span><\/p>\n<p><span style=\"font-weight: 400;\">nvUQgoLRta59hxiK1PXQczjP1KPls8OdWnap4HNIbi3WOim9hk\/Vn4R6BSvU1N9W<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Md4WkXw6WgzcPz1khdQTsZzDZbQNV0fI9fcM8nGoh6A1R7sCAwEAAaNGMEQwDgYD<\/span><\/p>\n<p><span style=\"font-weight: 400;\">VR0PAQH\/BAQDAgWgMBMGA1UdJQQMMAoGCCsGAQUFBwMBMAwGA1UdEwEB\/wQCMAAw<\/span><\/p>\n<p><span style=\"font-weight: 400;\">DwYDVR0RBAgwBocEfwAAATANBgkqhkiG9w0BAQsFAAOCAQEACiMJY3512tT+rEFJ<\/span><\/p>\n<p><span style=\"font-weight: 400;\">4xe0zGIoJi7ebXz1O8w8a2NBKjwWeZ2oCco0CxILfDn1EPH9NBZsiQS7w9OGz7VO<\/span><\/p>\n<p><span style=\"font-weight: 400;\">pwSVrt6\/jRIAAqnFxSUZpKiZ\/avNK5kpfufebxaA4ZQzrW4\/lePsBRcRl3ENWJup<\/span><\/p>\n<p><span style=\"font-weight: 400;\">OsE8hD4Xv\/LQHnZxZlbq8gQv8ZiJqsi8bRoEML4A4DgTmgvTYgT0XIp9V65H9zZ\/<\/span><\/p>\n<p><span style=\"font-weight: 400;\">jJEymoUx9eidAdfVo+l8PlE7YgRsrP9f7y5tDARAAmmAmL2mgUmzxqe49Hp8MPDl<\/span><\/p>\n<p><span style=\"font-weight: 400;\">ocTLZm1ryT+g1xvL\/EuuLOACUecInBnWSmzJep7Vw0jzqR92YWht6rM3NGfwNyzT<\/span><\/p>\n<p><span style=\"font-weight: 400;\">3hz7ZA==<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;&#8211;END CERTIFICATE&#8212;&#8211;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">subject=\/CN=127.0.0.1<\/span><\/p>\n<p><span style=\"font-weight: 400;\">issuer=\/CN=Couchbase Server de182d2a<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">No client certificate CA names sent<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;<\/span><\/p>\n<p><span style=\"font-weight: 400;\">SSL handshake has read 1881 bytes and written 631 bytes<\/span><\/p>\n<p><span style=\"font-weight: 400;\">&#8212;<\/span><\/p>\n<p><b>New, TLSv1\/SSLv3, Cipher is <\/b><b>AES128-SHA<\/b><\/p>\n<p><span style=\"font-weight: 400;\">Server public key is 2048 bit<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Secure Renegotiation IS supported<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Compression: NONE<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Expansion: NONE<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4><strong>Conclusion<\/strong><\/h4>\n<p><span style=\"font-weight: 400;\">With Cipher suites available in Couchbase Server 6.5, you can continually update your Couchbase instance to use the latest and greatest ciphers to stay safe. We hope you enjoyed this blog, and as always, we look forward to your feedback.\u00a0 Do take Couchbase Server for a spin and checkout all the new cool features, you can download Couchbase 6.5.<\/span><\/p>\n<h4 class=\"p1\"><b>Resources<\/b><\/h4>\n<p class=\"p1\"><i>Download<\/i><\/p>\n<p class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/couchbase.com\/downloads?family=server&amp;product=couchbase-server-developer\">Download Couchbase Server 6.5<\/a><\/span><\/p>\n<p class=\"p1\"><i>\u00a0<\/i><i>Documentation<\/i><\/p>\n<p class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/docs.couchbase.com\/server\/6.5\/release-notes\/relnotes.html\">Couchbase Server 6.5 Release Notes<\/a><\/span><\/p>\n<p class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/docs.couchbase.com\/server\/6.5\/introduction\/whats-new.html\">Couchbase Server 6.5 What\u2019s New<\/a><\/span><\/p>\n<p class=\"p1\"><i>Blogs<\/i><\/p>\n<p class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/www.couchbase.com\/blog\/announcing-couchbase-server-6-5-0-beta-whats-new-and-improved\/\">Blog: Announcing Couchbase Server 6.5 \u2013 What\u2019s New and Improved<\/a><\/span><\/p>\n<p class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/www.couchbase.com\/blog\/couchbase-brings-distributed-multi-document-acid-transactions-to-nosql\/\">Blog: Couchbase brings Distributed Multi-document ACID Transactions to NoSQL<\/a><\/span><\/p>\n<p class=\"p2\"><span class=\"s1\"><a href=\"https:\/\/www.couchbase.com\/blog\/tag\/6-5\/\"><b>All 6.5 Blogs<\/b><\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>For many, \u201cCryptography\u201d is the little green lock icon next to the web address of their favorite websites, and for others, they might recall the TLS vulnerabilities that have hit in recent years. Data is today\u2019s digital gold, and in [&hellip;]<\/p>\n","protected":false},"author":6588,"featured_media":7450,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[1814,1815,1821,1816,1813],"tags":[2378,1666],"ppma_author":[9064],"class_list":["post-7342","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-application-design","category-best-practices-and-tutorials","category-couchbase-architecture","category-couchbase-server","category-security","tag-6-5","tag-encryption"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.8 (Yoast SEO v25.8) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Cipher Suites in Couchbase Server 6.5 - The Couchbase Blog<\/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.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Cipher Suites in Couchbase Server 6.5\" \/>\n<meta property=\"og:description\" content=\"For many, \u201cCryptography\u201d is the little green lock icon next to the web address of their favorite websites, and for others, they might recall the TLS vulnerabilities that have hit in recent years. Data is today\u2019s digital gold, and in [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/\" \/>\n<meta property=\"og:site_name\" content=\"The Couchbase Blog\" \/>\n<meta property=\"article:published_time\" content=\"2019-08-06T06:15:54+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-06-14T02:26:47+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/Transactions-alternative-2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1400\" \/>\n\t<meta property=\"og:image:height\" content=\"553\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Chaitra Ramarao, Sr. Product Manager, Couchbase Inc.\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Chaitra Ramarao, Sr. Product Manager, Couchbase Inc.\" \/>\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.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/\"},\"author\":{\"name\":\"Chaitra Ramarao, Sr. Product Manager, Couchbase Inc.\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/#\/schema\/person\/852cd95d6c8aa5ea6d4128643cc3c2b6\"},\"headline\":\"Cipher Suites in Couchbase Server 6.5\",\"datePublished\":\"2019-08-06T06:15:54+00:00\",\"dateModified\":\"2025-06-14T02:26:47+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/\"},\"wordCount\":819,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.couchbase.com\/blog\/wp-content\/uploads\/sites\/1\/2019\/08\/Transactions-alternative-2.jpg\",\"keywords\":[\"6.5\",\"Encryption\"],\"articleSection\":[\"Application Design\",\"Best Practices and Tutorials\",\"Couchbase Architecture\",\"Couchbase Server\",\"Security\"],\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/\",\"url\":\"https:\/\/www.couchbase.com\/blog\/cipher-suites-in-couchbase-6-5\/\",\"name\":\"Cipher Suites in Couchbase Server 6.5 - 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