squarectf/index.html at master · square/squarectf · GitHub

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<html lang="en">

<head>
    <title>Block CTF: hacking competition!</title>
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <link rel="shortcut icon" type="image/x-icon" href="favicon.ico">
    <meta name="og:title" content="Block CTF: hacking competition!">
    <meta name="og:url" content="https://blockctf.com/">
    <meta property="og:type" content="website">
    <meta name="og:description" content="Compete to solve security-related challenges.">
    <meta property="og:image" content="/og.png">

    <meta name="twitter:card" content="summary">
    <meta name="twitter:site" content="@BlockEng">
    <meta name="twitter:title" content="Block CTF: We make security and hacking more approachable — since 2014.">
    <meta name="twitter:description" content="Compete to solve security-related challenges.">
    <meta name="twitter:image" content="/og.png">

    <meta name="description" content="Compete to solve security-related challenges.">
    <meta name="author" content="Block, Inc.">
    <link rel="stylesheet" media="screen" href="squarectf.css">
</head>

<body>
    <div class="wideline begin">
        <span>Block_CTF(1)</span>
        <span><a href="index.html"><img src="https://storage.googleapis.com/square-console-production/assets/2380a284d3e59ed8449cdf60c66972abd30d4e1ad24968b4b9f2ad7596f6cc0d4cf5456b67f255ab3231f6f6410be02b527325b4373237e7697e84e221faeaeb.png"></a></span>
        <span>Block_CTF(1)</span>
    </div>

    <h1>Name</h1>
    <p>BlockCTF - Capture the Flag competitions, hosted by Block, where teams compete to solve security-related challenges for points.</p>

    <h1>New to CTFs?</h1>
    <p>Our CTFs are meant to be fun for both first time and experienced players. We
        create an assortment of easy, medium, and hard puzzles.</p>
    <p>We aspire to create a few novel puzzles, putting everyone on the same level.</p>
    <p>We have a <a href="tips.html">list of tips</a> that should help you get started. Most of our previous years'
        challenges and their solutions are made available to you. You are <a href="https://creativecommons.org/licenses/by/4.0/">free to use</a>
        the content on this site as you please — you may even flatter us by copying bits and pieces for your own event!</p>

    <h1>Events</h1>
    <ul>
        <li>2024: <a href="2024/index.html">challenges, writeups and results</a></li>
        <li>2023: <a href="2023/index.html">challenges, writeups and results</a></li>
        <li>2022: <a href="2022/index.html">challenges, writeups and results</a></li>
        <li>2021: <a href="2021/index.html">challenges, writeups and results</a></li>
        <li>2020: <a href="2020/index.html">challenges, writeups and results</a></li>
        <li>2019: <a href="2019/index.html">challenges, writeups and results</a></li>
        <li>2018: <a href="2018/index.html">challenges, writeups and results</a></li>
        <li>2017: <a href="2017/index.html">challenges, writeups and results</a></li>
        <li>2016: Slack bots have gained self awareness and are reading the news (private event).</li>
        <li>2015: BrewBOT (private event).</li>
        <li>2014: <a href="https://microcorruption.com/">Microcorruption: Embedded Security CTF</a> (co-organized) | <a href="http://ghettohaxxx-blog.azurewebsites.net/microcorruption-ctf-writeup/">write up</a>.</li>
    </ul>

    <h1>Contact</h1>
    <ul>
        <li>ctf-help@squareup.com</li>
        <li>Join our <a href="https://discord.com/invite/Syv9gJ4n3m">BlockCTF Discord server!</a></li>
    </ul>

    <h1>Credits</h1>
    <p>Our CTFs have been possible thanks to Square/Block engineers contributing their
        time, skills, and energy. Every year, about a dozen engineers get together to build puzzles, as well as spin up
        all the infrastructure needed to run a smooth competition. We hope you find these puzzles fun and educational,
        we definitely enjoy making them!</p>
    <ul>
        <li>Mat Byczkowski: Puzzles (2019)</li>
        <li>Paras Chetal: Puzzles (2023, 2024)</li>
        <li><a href="https://rahalkar.dev">Chaitanya Rahalkar</a>: Puzzles &amp; Infrastructure (2024)</li>
        <li>Leon Chou: Puzzles &amp; Infrastructure (2020)</li>
        <li>Peter Collins: Infrastructure &amp; puzzles (2017)</li>
        <li>Manoj Dayaram: Infrastructure (2017)</li>
        <li>Alex Epifano (2021)</li>
        <li>Stefan Filipek: Puzzles &amp; Infrastructure (2023, 2024)</li>
        <li>Kyle Fox:
          <div>Organizer (2020, 2021, 2022, 2023, 2024)</div>
          <div>Puzzles &amp; Infrastructure (2018, 2020, 2021, 2022, 2023, 2024)</div>
        </li>
        <li>Davis Gallinghouse: Puzzles (2015, 2016)</li>
        <li>Daniel Ge: Infrastructure (2018)</li>
        <li>Ross Glashan: Puzzles (2017, 2018)</li>
        <li>Alex Hanlon: Puzzles (2022, 2023)</li>
        <li>Sarah Harvey: Chief CTF Officer (2017)</li>
        <li>Adam Jimenez: Puzzles (2020, 2023)</li>
        <li>Bart Kosciarz: Puzzles (2023, 2024)</li>
        <li>John Lewis: Creative writing (2015, 2016)</li>
        <li>Aaron Lindsey: Puzzles &amp; Infrastructure (2022, 2023, 2024)</li>
        <li>Kent Ma: Puzzles &amp; Infrastructure (2022, 2023, 2024)</li>
        <li>Jack Maginnes: Puzzles (2022)</li>
        <li>Will McChesney: Puzzles (2017)</li>
        <li>Matthew McPherrin: Prizes &amp; puzzles (2016, 2017)</li>
        <li>Jordan Mecom: Puzzles 2017 (2018)</li>
        <li><a href="https://www.quaxio.com/">Alok Menghrajani</a>:
          <div>Organizer (2015, 2016, 2017, 2018, 2019, 2024)</div>
          <div>Puzzles (2015, 2016, 2017, 2018, 2019, 2022, 2024)</div>
        </li>
        <li>Dan Moore: Puzzles &amp; Infrastructure (2022)</li>
        <li>Murtaza Munaim: Puzzles (2017)</li>
        <li>Jesse Peirce: Workshop &amp; creative writing (2017, 2018)</li>
        <li>Ford Peprah: Puzzles (2018)</li>
        <li>Achintya Prakash: Infrastructure &amp; puzzles (2018, 2019)</li>
        <li>Alyssa Ransbury: Puzzles (2019)</li>
        <li>Mathew Rowley: Puzzles (2017)</li>
        <li>Isaac Semaya: Puzzles (2020, 2021)</li>
        <li>Jay Smith: Puzzles (2021)</li>
        <li>Salvatore Testa: Puzzles &amp; creative writing (2017, 2019)</li>
        <li>Alice Wang: Puzzles (2017, 2018)</li>
        <li>Brian Wang: Puzzles (2017)</li>
        <li>Jared Windover: Design (2018)</li>
        <li>Roy Xu: Puzzles (2019, 2020, 2021)</li>
        <li>Bushi Zhang: Art work (2019)</li>
        <li>Chaoshun Zuo: Puzzles (2023, 2024)</li>
    </ul>
    <p>+ everyone who has helped us in various ways. Including making sure our puzzles are solvable, publicizing our
        events, and helping out with last minute show stoppers.</p>
    <p>We are also thankful to everyone who took the time to publish writeups/solutions!</p>

    <h1>See also</h1>
    <p>
        <a href="https://block.xyz/careers">Work_at_Block(1)</a>,
        <a href="https://squareup.com/legal/privacy">Privacy_policy(1)</a>,
        <a href="code_of_conduct.html">Code_of_conduct(1)</a>
    </p>
    <div class="wideline end">
        <span>Block, Inc.</span>
        <span>(c) <script>
                document.write(new Date().toLocaleString("en-us", {
                    month: "long",
                    year: "numeric"
                }));
            </script></span>
        <span>Block_CTF(1)</span>
    </div>
</body>

</html>