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212 lines
14 KiB
HTML
212 lines
14 KiB
HTML
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<title>Crowdsourcing a More Secure Future</title>
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<a href="/blog/group-video-calls" class="side_blog_entry">
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<div class="side_blog_date">Jun 25</div>
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<div class="side_blog_title">Group Video Calls</div>
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</a><a href="/blog/animated-backgrounds" class="side_blog_entry">
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<div class="side_blog_date">Jun 25</div>
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<div class="side_blog_title"> Animated Backgrounds</div>
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</a><a href="/blog/payments-2-0-scheduled-voice-chats" class="side_blog_entry">
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<div class="side_blog_date">Apr 26</div>
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<div class="side_blog_title">Payments 2.0, Scheduled Voice Chats, New Web Versions</div>
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</a><a href="/blog/voice-chats-on-steroids" class="side_blog_entry">
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<div class="side_blog_date">Mar 19</div>
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<div class="side_blog_title">Voice Chats 2.0: Channels, Millions of Listeners, Recorded Chats, Admin Tools</div>
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</a><a href="/blog/autodelete-inv2" class="side_blog_entry">
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<div class="side_blog_date">Feb 23</div>
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<div class="side_blog_title">Auto-Delete, Widgets and Expiring Invite Links</div>
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</a><a href="/blog/move-history" class="side_blog_entry">
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<div class="side_blog_date">Jan 28</div>
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<div class="side_blog_title">Moving Chat History from Other Apps</div>
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</a><a href="/blog/voice-chats" class="side_blog_entry">
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<div class="side_blog_date">Dec 23</div>
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<div class="side_blog_title">Voice Chats Done Right</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">Crowdsourcing a More Secure Future</h1>
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<div id="dev_page_content"><div class="blog_side_image_wrap">
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<img src="/img/tl_card_castle.png" class="blog_side_image"/>
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</div>
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<p>A few days ago we launched a <a href="http://telegram.org/crypto_contest"><strong>contest</strong></a> to improve Telegram's security and are delighted to already have the first results. A <a href="http://habrahabr.ru">Russian IT-community</a> user identified a potentially vulnerable spot in our secret chat implementation. While this would not help him decipher the traffic and win <a href="http://telegram.org/crypto_contest">the contest</a>, his achievement deserves a notice — and a big prize.</p>
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<blockquote>
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<p>The habrahabr user <a href="http://habrahabr.ru/users/x7mz/">x7mz</a> had discovered that in case the Telegram server could be seized by a malicious third party, it could send different nonce numbers to each of the clients participating in a secret chat.</p>
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<p>These nonce numbers were introduced to add more randomness to the secret chat keys, mostly because of possible undiscovered vulnerabilities of the random generators on mobile devices (for example, one such vulnerability was found this August in <a href="http://android-developers.blogspot.ru/2013/08/some-securerandom-thoughts.html">android phones</a>).</p>
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<p>As was pointed out, this solution would have also made it possible for the visual representations of the shared secret key to be identical in case of a man-in-the-middle attack — provided such attack was done by the seized server. Obviously, the server has been under Telegram's control all this time, so this theoretical threat never had a chance to come to life.</p>
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</blockquote>
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<p>The developer who found the potential weakness has earned a reward of <strong>$100,000</strong>. We have contacted him to find out how he would like to collect his prize.</p>
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<p>A similar reward awaits anyone who finds viable ways of compromising <a href="https://core.telegram.org/mtproto">MTProto’s</a> security (and there is an outstanding reward of $200,000 for <a href="http://telegram.org/crypto_contest">deciphering Telegram traffic</a>). All submissions to <strong>security@telegram.org</strong> which result in a change of code or configuration are eligible for bounties, ranging from <strong>$500</strong> to <strong>$100,000</strong> or more, depending on the severity of the issue.</p>
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<p>This story showcases the importance of keeping the <a href="https://core.telegram.org/mtproto">protocol specification</a> and <a href="http://telegram.org/source">source code</a> open — this way thousands of bright minds from all over the world can help us find potential vulnerabilities and improve the protocol.</p>
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<p>Let’s keep on looking for any weak spots. Together we can make Telegram unbreakable.</p>
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<p>December 21, 2013<br><em>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%2Fcrowdsourcing-a-more-secure-future&text=A%20guy%20from%20Russia%20just%20earned%20%24100%2C000.%20Crowdsourcing%20a%20More%20Secure%20Future" class="tl_telegram_share_btn" id="tl_telegram_share_btn" data-text="A guy from Russia just earned $100,000. Crowdsourcing a More Secure Future" data-url="https://telegram.org/blog/crowdsourcing-a-more-secure-future"><i class="tl_telegram_share_icon"></i><span class="tl_telegram_share_label" target="_blank">Forward</span></a>
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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/group-video-calls"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001231/2/Q0OFpRBNruI.71986/42d2a05bd0d1bd091b" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Group Video Calls</h4>
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<div class="dev_blog_card_lead">Today's update lets you turn on your camera or share your screen during Voice Chats in groups – on all devices, including tablets and desktops. This brings voice chats to a whole new…</div>
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</div>
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<div class="dev_blog_card_date">Jun 25, 2021</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/animated-backgrounds"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001689/5/LAdUj8JXG_c.61616/b196801953bc54ecd5" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title"> Animated Backgrounds</h4>
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<div class="dev_blog_card_lead">In addition to Group Video Calls, this update adds animated backgrounds and message sending animations, as well as a new menu button for bots, new ways to import stickers, reminders…</div>
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</div>
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<div class="dev_blog_card_date">Jun 25, 2021</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/payments-2-0-scheduled-voice-chats"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001783/2/6Is-qGJkgX4.92603/d4d7fe3e0fc14ff3ba" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Payments 2.0, Scheduled Voice Chats, New Web Versions</h4>
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<div class="dev_blog_card_lead">This update brings Payments 2.0 for all Telegram chats, Scheduling and Mini Profiles for Voice Chats, new versions of Telegram Web for…</div>
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</div>
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<div class="dev_blog_card_date">Apr 26, 2021</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/voice-chats-on-steroids"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001855/3/O31CcF_-a20.86962/cafa0c3d7dd2df1134" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Voice Chats 2.0: Channels, Millions of Listeners, Recorded Chats, Admin Tools</h4>
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<div class="dev_blog_card_lead">Voice Chats first appeared in December, adding a new dimension of live talk to Telegram groups. Starting today, they become available in…</div>
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</div>
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<div class="dev_blog_card_date">Mar 19, 2021</div>
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</div></a>
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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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