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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/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, Jump to Next Channel and Trending Stickers</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, Video Messages 2.0 and More</div>
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</a><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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<div id="dev_page_content_wrap" class=" ">
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<h1 id="dev_page_title">Crowdsourcing a More Secure Future</h1>
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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 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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<a class="dev_blog_card_link_wrap" href="/blog/live-streams-forwarding-next-channel"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001784/4/IlXX31YWz5U.92729/eabf233f3635354560" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Live Streams, Flexible Forwarding, Jump to Next Channel and Trending Stickers</h4>
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<div class="dev_blog_card_lead">Telegram 8.0 brings live streams with unlimited viewers to groups and channels, options to remove captions from media and hide sender names…</div>
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</div>
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<div class="dev_blog_card_date">Aug 31, 2021</div>
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</div></a><a class="dev_blog_card_link_wrap" href="/blog/video-1000"><div class="dev_blog_card_wrap">
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<img class="dev_blog_card_image" src="https://telegram.org/file/464001574/3/Pqda66P2qCA.71942/56366f0bdd3630cab8" />
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<div class="dev_blog_card_alltext_wrap">
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<h4 class="dev_blog_card_title">Video Calls with up to 1000 Viewers, Video Messages 2.0, Video Playback Speed and More</h4>
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<div class="dev_blog_card_lead">This update takes video to the next level. Group video calls now have up to 1000 viewers,…</div>
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</div>
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<div class="dev_blog_card_date">Jul 30, 2021</div>
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</div></a><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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Telegram is a cloud-based mobile and desktop messaging app with a focus on security and speed.
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