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<!DOCTYPE html>
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<title>chmod +x singularity.sh</title>
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<meta name="author" content="Marina von Steinkirch">
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<h1><a href="./csaw-ctf-2014-forensics-200-why-not-sftp.html">CSAW CTF 2014 - Forensics 200: "why not sftp?"</a></h1>
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<abbr class="published" title="2014-09-22T05:20:00">
Mon 22 September 2014 </abbr>
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<div class="summary"><p>The purpose of this problem is to teach about the need of encrypting your data. The <a href="http://en.wikipedia.org/wiki/File_Transfer_Protocol">FTP</a> protocol sends clear text over the wire, <em>i.e</em> the data is transmitted without any encryption.
<a href="http://en.wikipedia.org/wiki/SSH_File_Transfer_Protocol">SSH/Secure File Transfer Protocol</a> is a network protocol providing secure file transfer. Using SFTP, instead of ...</p>
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<h1><a href="./csaw-ctf-2014-cryptography-200-psifer-school.html">CSAW CTF 2014 - Cryptography 200 - Psifer School</a></h1>
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<abbr class="published" title="2014-09-21T00:20:00">
Sun 21 September 2014 </abbr>
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<div class="summary"><p>This is the first crypto-problem, and it was supposed to be the easiest one. For this reason I was expecting simple cryptographic algorithms, which turned out to be true.</p>
<p>The problem starts with the following text:</p>
<blockquote>
<p>There's no heartbleed here. Why don't we use these ciphers?</p>
<p>nc 54 ...</p></blockquote>
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<h1><a href="./a-lit-backdoor.html">A Lit Backdoor</a></h1>
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<abbr class="published" title="2014-06-21T02:00:00">
Sat 21 June 2014 </abbr>
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<div class="summary"><p>I was never a big fan of Macbooks. Being a penguin user for so long, you learn to stop worrying and love love the bomb. But here is a little trick that works for both.</p>
<p>In the victim's machine (presumably a macbook), create the reverse shell in the port ...</p>
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<h1><a href="./getting-your-public-ip-from-the-terminal.html">Getting your Public IP from the Terminal</a></h1>
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<abbr class="published" title="2014-06-21T02:00:00">
Sat 21 June 2014 </abbr>
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<div class="summary"><p>Public IPv4 addresses are assigned by <a href="https://en.wikipedia.org/?title=InterNIC">NIC</a> and belongs to <a href="https://en.wikipedia.org/wiki/Classless_Inter-Domain_Routing">CIDR blocks</a> that are unique to the entire internet. </p>
<p>In this little post I show many ways to find your public IP address form the Linux terminal. </p>
<h3>Using Curl</h3>
<p>You can simply curl it from IP websites:</p>
<div class="highlight"><pre><span class="nv">$ </span> curl ifconfig.me ...</pre></div>
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