mirror of
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229 lines
15 KiB
HTML
229 lines
15 KiB
HTML
<!DOCTYPE html>
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<html class="">
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<head>
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<meta charset="utf-8">
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<title>More Speed and Security!</title>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<meta property="og:title" content="More Speed and Security!">
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<meta property="og:image" content="https://telegram.org/file/811140886/164e/NRgod4GLJ74.739306/3d3e38ddcf093e95f9">
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<meta property="og:site_name" content="Telegram">
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<meta property="og:description" content="Higher download speed for popular public media from massive channels with distributed encrypted CDNs ">
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<meta property="article:published_time" content="2017-07-23T15:34:00+00:00"><meta name="twitter:card" content="summary_large_image" /><meta name="twitter:image" content="https://telegram.org/file/811140886/164e/NRgod4GLJ74.739306/3d3e38ddcf093e95f9" />
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<meta name="telegram:channel" content="@telegram">
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<link rel="canonical" href="https://telegram.org/blog/encrypted-cdns" />
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<link rel="icon" type="image/svg+xml" href="/img/website_icon.svg?4">
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<link rel="icon" type="image/png" sizes="32x32" href="/img/favicon-32x32.png">
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<link rel="icon" type="image/png" sizes="16x16" href="/img/favicon-16x16.png">
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<link rel="alternate icon" href="/img/favicon.ico" type="image/x-icon" />
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<link href="/css/bootstrap.min.css?3" rel="stylesheet">
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<link href="/css/telegram.css?236" rel="stylesheet" media="screen">
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</head>
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<body class="preload">
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<div id="fb-root"></div>
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<div class="tl_page_wrap">
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<div class="tl_page_head navbar navbar-static-top navbar navbar-tg">
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<div class="navbar-inner">
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<div class="container clearfix">
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<ul class="nav navbar-nav navbar-right"><li class="dropdown top_lang_select"><a class="dropdown-toggle" onclick="return dropdownClick(this, event)" href="#"><i class="dev_top_lang_icon"></i>EN <b class="minicaret"></b></a>
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<ul class="dropdown-menu"><li class="chosen "><a href="?setln=en">English</a></li><li class="long "><a href="?setln=id">Bahasa Indonesia</a></li><li class="long "><a href="?setln=ms">Bahasa Melayu</a></li><li class=""><a href="?setln=de">Deutsch</a></li><li class=""><a href="?setln=es">Español</a></li><li class=""><a href="?setln=fr">Français</a></li><li class=""><a href="?setln=it">Italiano</a></li><li class=""><a href="?setln=nl">Nederlands</a></li><li class=""><a href="?setln=uz">O‘zbek</a></li><li class=""><a href="?setln=pl">Polski</a></li><li class="long "><a href="?setln=pt-br">Português (Brasil)</a></li><li class=""><a href="?setln=tr">Türkçe</a></li><li class=""><a href="?setln=be">Беларуская</a></li><li class=""><a href="?setln=ru">Русский</a></li><li class=""><a href="?setln=uk">Українська</a></li><li class=""><a href="?setln=ar">العربية</a></li><li class=""><a href="?setln=fa">فارسی</a></li><li class=""><a href="?setln=ko">한국어</a></li></ul></li><li class="navbar-twitter hidden-xs"><a href="https://twitter.com/telegram" target="_blank" data-track="Follow/Twitter" onclick="trackDlClick(this, event)"><i class="icon icon-twitter"></i> Twitter</a></li></ul>
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<li class=""><a href="/">Home</a></li>
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<li class=""><a href="/faq">FAQ</a></li>
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<li class=""><a href="/apps">Apps</a></li>
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<li class="hidden-xs "><a href="//core.telegram.org/api">API</a></li>
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<li class="hidden-xs "><a href="//core.telegram.org/mtproto">Protocol</a></li>
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</ul>
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</div>
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<div class="container clearfix tl_page_container ">
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<div class="tl_page">
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<div class="tl_contest_page_wrap">
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<div class="tl_blog_side_blog"><div class="side_blog_wrap">
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<div class="side_blog">
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<a href="/blog" class="side_blog_header">Recent News</a>
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<div class="side_blog_entries">
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<a href="/blog/similar-channels" class="side_blog_entry">
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<div class="side_blog_date">Nov 30</div>
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<div class="side_blog_title">Similar Channels, Reposting Stories, and 9 More Features</div>
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</a><a href="/blog/giveaways" class="side_blog_entry">
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<div class="side_blog_date">Nov 6</div>
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<div class="side_blog_title">Giveaways in Channels and Free Premium</div>
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</a><a href="/blog/reply-revolution" class="side_blog_entry">
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<div class="side_blog_date">Oct 28</div>
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<div class="side_blog_title">Replies 2.0, Adjustable Link Previews, Name Colors and More</div>
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</a><a href="/blog/channel-stories" class="side_blog_entry">
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<div class="side_blog_date">Sep 22</div>
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<div class="side_blog_title">Stories in Channels, View-Once Media and More</div>
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</a><a href="/blog/stories" class="side_blog_entry">
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<div class="side_blog_date">Aug 14</div>
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<div class="side_blog_title">Stories and 10 Years of Telegram</div>
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</a><a href="/blog/shareable-folders-custom-wallpapers" class="side_blog_entry">
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<div class="side_blog_date">Apr 21</div>
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<div class="side_blog_title">Shareable Chat Folders, Custom Wallpapers and More</div>
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</a><a href="/blog/power-saving" class="side_blog_entry">
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<div class="side_blog_date">Mar 8</div>
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<div class="side_blog_title">Power Saving Mode and More</div>
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</a>
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</div>
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</div>
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</div></div>
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<div id="dev_page_content_wrap" class=" ">
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<div class="dev_page_bread_crumbs"></div>
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<h1 id="dev_page_title">More Speed and Security!</h1>
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<div id="dev_page_content"><div class="blog_side_image_wrap">
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<img src="/file/811140669/160d/g_PcT-M-m8A.24441.gif/bd548b27837cc8f195" class="blog_side_image"/>
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</div>
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<div class="blog_wide_image"><a href="/file/811140886/164e/NRgod4GLJ74.739306/3d3e38ddcf093e95f9" target="_blank"><img src="/file/811140290/150b/IpxYa5K2_3E.127469/11d888bbf92b4b42d8" title="Encrypted CDNs for Speed and Security"/></a>
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</div>
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<p>We at Telegram love to build sophisticated technologies that combine speed with security. Starting with Telegram <strong>4.2</strong>, we support <a href="https://en.wikipedia.org/wiki/Content_delivery_network">CDN caching</a>. CDNs are third-party caching nodes that we’ll use to cache publicly available videos and photos posted in massive channels (say, with <strong>100,000+</strong> subscribers) for users in remote locations where Telegram is popular.</p>
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<p>This will increase download speeds for tens of millions of users as CDN caching allows data to travel shorter distances and helps avoid bottlenecks that exist between regions. </p>
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<p>While these caching nodes are only used to temporarily store <strong>public</strong> media (imagine Telegram versions of superpopular YouTube hits), all data that goes through them is <strong>encrypted</strong> with a key unknown to the caching nodes. In other words, we treat these CDN caching nodes just like we treat your internet provider – they only ever get encrypted junk they can't decipher.</p>
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<h4><a class="anchor" name="heres-how-it-works" href="#heres-how-it-works"><i class="anchor-icon"></i></a>Here’s how it works</h4>
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<div class="blog_wide_image">
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<a href="/file/811140934/1815/aSQ-nSUHJzc.45662/40c2955965574cef80" target="_blank"><img src="/file/811140934/1815/aSQ-nSUHJzc.45662/40c2955965574cef80" title="Content Delivery Network" /></a>
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</div>
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<p>If you're interested in the technical details, feel free to check out <a href="https://core.telegram.org/cdn">this page</a> that describes the relevant encryption and security checks. And as always – the updated source code for the Telegram apps is open and available for your scrutiny. Security experts are welcome to verify the implementation of CDNs based on the <a href="/apps#source-code">open source code</a> we make available for all of our apps.</p>
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<p>Thanks to this technology, the download speed for public photos and videos in places like South America, Turkey, Indonesia, India, Iran or Iraq will significantly increase without the slightest compromise in security. </p>
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<h4><a class="anchor" name="to-sum-up" href="#to-sum-up"><i class="anchor-icon"></i></a>To sum up</h4>
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<ul>
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<li>Download speeds for popular public media are set to increase several times for millions of Telegram users.</li>
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<li>CDN caching nodes are not Telegram servers and not part of the Telegram cloud.</li>
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<li>CDNs are used only for caching popular public media from massive channels. Private data never goes there.</li>
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<li>CDNs only get encrypted data and they never have the keys: even if they are accessed by hackers or third parties, the attacker won’t be able to decipher the files.</li>
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<li>Data downloaded from CDN caching nodes is always verified by the receiving Telegram app by way of hash: attackers won’t be able to replace any files with their own versions.</li>
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<li>Detailed technical info about CDNs can be found <a href="https://core.telegram.org/cdn">here</a>, the updated source code of Telegram apps ready for CDN support can be found <a href="/apps#source-code">here</a>.</li>
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<li>Telegram 4.2 also includes <a href="https://telegram.org/blog/now-you-see-me">a bucketful of other goodies</a> for you to enjoy.</li>
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</ul>
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<div><br></div>
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<p>Stay safe (and fast)!</p>
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<p><em>July 23, 2017<br>The Telegram Team</em></p>
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</div>
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</div>
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<div class="tl_main_share clearfix">
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<a href="https://t.me/share/url?url=https%3A%2F%2Ftelegram.org%2Fblog%2Fencrypted-cdns&text=Higher%20download%20speed%20for%20popular%20public%20media%20from%20massive%20channels%20with%20distributed%20encrypted%20CDNs%20" class="tl_telegram_share_btn" id="tl_telegram_share_btn" data-text="Higher download speed for popular public media from massive channels with distributed encrypted CDNs " data-url="https://telegram.org/blog/encrypted-cdns"><i class="tl_telegram_share_icon"></i><span class="tl_telegram_share_label" target="_blank">Forward</span></a>
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<a href="https://twitter.com/share" class="tl_twitter_share_btn" id="tl_twitter_share_btn" data-text="Higher download speed for popular public media from massive channels with distributed encrypted CDNs " data-url="https://telegram.org/blog/encrypted-cdns" data-via="Telegram">Tweet <span class="tl_twitter_share_cnt"></span></a>
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</div>
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</div>
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<div class="tl_main_recent_news_wrap tlb_other_news_wrap tl_blog_list_page_wrap">
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<h3 class="tl_main_recent_news_header">
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<a href="/blog">Other News</a>
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</h3>
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<div class="tl_main_recent_news_cards clearfix">
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<a class="dev_blog_card_link_wrap" href="/blog/similar-channels"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/400780400090/1/RprIYMnvOUg.277465/d9f6381d8e3088a8f7" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Similar Channels, Reposting Stories, and 9 More Features</h4>
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<div class="dev_blog_card_lead">Today's update lets you find more channels on similar topics, repost stories from friends and channels, and add video messages to stories.…</div>
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</div>
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<div class="dev_blog_card_date">Nov 30, 2023</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/giveaways"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/400780400867/1/urmYJbbNk5E.288288/8288e7d1770857dcf1" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Giveaways in Channels and Free Premium</h4>
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<div class="dev_blog_card_lead">Channel owners can now launch Giveaways to randomly distribute prizes among their followers. This is great if you want to promote your channel, get new subscribers or reward existing…</div>
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</div>
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<div class="dev_blog_card_date">Nov 6, 2023</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/reply-revolution"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/400780400780/1/g_radu3Y0M8.287207/035dae82b433286e51" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Replies 2.0, Adjustable Link Previews, Name Colors and More</h4>
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<div class="dev_blog_card_lead">Today's update lets you quote specific parts of messages when replying, send your replies to other chats, add quote formatting to any text…</div>
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</div>
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<div class="dev_blog_card_date">Oct 28, 2023</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/channel-stories"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/400780400873/1/yQiyKrn7_NE.258715/33a6d6c835c123263a" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Stories in Channels, View-Once Media and More</h4>
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<div class="dev_blog_card_lead">Channels can start posting stories thanks to a new boost system. Stories now have reaction stickers and the option to add your own music.…</div>
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</div>
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<div class="dev_blog_card_date">Sep 22, 2023</div>
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</div></a>
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</div>
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</div>
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</div>
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</div>
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</div>
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<div class="footer_wrap">
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<div class="footer_columns_wrap footer_desktop">
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<div class="footer_column footer_column_telegram">
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<h5>Telegram</h5>
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<div class="footer_telegram_description"></div>
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Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.
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<div class="footer_column">
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<h5><a href="/faq">About</a></h5>
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<ul>
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<li><a href="/privacy">Privacy</a></li>
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<li><a href="/press">Press</a></li>
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<h5><a href="//core.telegram.org/">Platform</a></h5>
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<li><a href="//instantview.telegram.org/">Instant View</a></li>
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<h5><a href="//core.telegram.org/">Platform</a></h5>
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