mirror of
https://github.com/MarshalX/telegram-crawler.git
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228 lines
15 KiB
HTML
228 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 property="fb:app_id" content="254098051407226">
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<meta property="vk:app_id" content="3782569">
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<meta name="apple-itunes-app" content="app-id=686449807">
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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="alternate icon" href="/favicon.ico?4" 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?215" rel="stylesheet" media="screen">
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<style>
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</style>
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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> <b class="minicaret"></b></a>
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<ul class="dropdown-menu"><li class=""><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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<ul class="nav navbar-nav">
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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>
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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/video-stickers-better-reactions" class="side_blog_entry">
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<div class="side_blog_date">Jan 31</div>
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<div class="side_blog_title">Video Stickers, Better Reactions and More</div>
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</a><a href="/blog/reactions-spoilers-translations" class="side_blog_entry">
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<div class="side_blog_date">Dec 30</div>
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<div class="side_blog_title">Reactions, Spoilers, Translation and QR Codes</div>
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</a><a href="/blog/protected-content-delete-by-date-and-more" class="side_blog_entry">
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<div class="side_blog_date">Dec 7</div>
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<div class="side_blog_title">Protected Content, Delete by Date, Device Management and More</div>
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</a><a href="/blog/shared-media-scrolling-calendar-join-requests-and-more" class="side_blog_entry">
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<div class="side_blog_date">Nov 3</div>
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<div class="side_blog_title">Hyper-Speed Scrolling and Calendar View for Shared Media, Join Requests and More</div>
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</a><a href="/blog/chat-themes-interactive-emoji-read-receipts" class="side_blog_entry">
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<div class="side_blog_date">Sep 19</div>
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<div class="side_blog_title">Chat Themes, Interactive Emoji, Read Receipts in Groups</div>
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</a><a href="/blog/live-streams-forwarding-next-channel" class="side_blog_entry">
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<div class="side_blog_date">Aug 31</div>
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<div class="side_blog_title">Live Streams, Flexible Forwarding and More</div>
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</a><a href="/blog/video-1000" class="side_blog_entry">
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<div class="side_blog_date">Jul 30</div>
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<div class="side_blog_title">Video Calls with up to 1000 Viewers, Video Playback Speed 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/video-stickers-better-reactions"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001234/e805/Z0pNrCJET-E.104373/a38ce74977bc53b064" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Video Stickers, Better Reactions and More</h4>
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<div class="dev_blog_card_lead">This update brings easy-to-make video stickers, better reactions with more compact animations and extra emoji, a button to review unseen…</div>
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</div>
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<div class="dev_blog_card_date">Jan 31, 2022</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/reactions-spoilers-translations"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001488/d35b/oNi_rR0In0o.124097/c74f7d759893b78bfb" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Reactions, Spoilers, Translation and QR Codes</h4>
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<div class="dev_blog_card_lead">Telegram's 12th update of the year introduces reactions, message translation, themed QR codes, hidden text (spoilers), and more.</div>
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</div>
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<div class="dev_blog_card_date">Dec 30, 2021</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/protected-content-delete-by-date-and-more"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001572/2/u_lvhH-CjJ0.99595/a7fca60f9c9e6e193c" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Protected Content, Delete by Date, Device Management and More</h4>
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<div class="dev_blog_card_lead">Today's update brings tools to prevent others from saving content from groups and channels, the ability to delete messages for specific…</div>
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</div>
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<div class="dev_blog_card_date">Dec 7, 2021</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/shared-media-scrolling-calendar-join-requests-and-more"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001930/3/yPTwxfusWZg.174275/3f847742c263cdae99" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Hyper-Speed Scrolling and Calendar View for Shared Media, Join Requests, Global Chat Themes on iOS and More</h4>
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<div class="dev_blog_card_lead">Today's update brings new ways to find memories in shared media with accelerated scrolling…</div>
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</div>
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<div class="dev_blog_card_date">Nov 3, 2021</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>
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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="/faq">FAQ</a></li>
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<li><a href="/blog">Blog</a></li>
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<li><a href="/jobs">Jobs</a></li>
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</ul>
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</div>
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<div class="footer_column">
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<h5><a href="/apps#mobile-apps">Mobile Apps</a></h5>
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<ul>
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<li><a href="/dl/ios">iPhone/iPad</a></li>
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<li><a href="/dl/android">Android</a></li>
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<li><a href="/dl/wp">Windows Phone</a></li>
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</ul>
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</div>
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<div class="footer_column">
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<h5><a href="/apps#desktop-apps">Desktop Apps</a></h5>
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<ul>
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<li><a href="//desktop.telegram.org/">PC/Mac/Linux</a></li>
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<li><a href="//macos.telegram.org/">macOS</a></li>
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<li><a href="/dl/web">Web-browser</a></li>
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</ul>
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<div class="footer_column footer_column_platform">
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<h5><a href="//core.telegram.org/">Platform</a></h5>
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<ul>
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<li><a href="//core.telegram.org/api">API</a></li>
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<li><a href="//translations.telegram.org/">Translations</a></li>
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<li><a href="//instantview.telegram.org/">Instant View</a></li>
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</ul>
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</div>
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<div class="footer_columns_wrap footer_mobile">
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<div class="footer_column">
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<h5><a href="/faq">About</a></h5>
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</div>
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<div class="footer_column">
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<h5><a href="/blog">Blog</a></h5>
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</div>
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<div class="footer_column">
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<h5><a href="/apps">Apps</a></h5>
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<div class="footer_column">
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<h5><a href="//core.telegram.org/">Platform</a></h5>
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<h5><a href="https://twitter.com/telegram" target="_blank" data-track="Follow/Twitter" onclick="trackDlClick(this, event)">Twitter</a></h5>
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