6dv9lk1pbaflulau/blog-contributions
1
0
Fork 0
forked from nihilist/blog-contributions
Code Pull Requests Activity

fix internal hyperlink

Browse Source
This commit is contained in:
Zesc 2024-09-27 00:06:12 +02:00
parent 2daa72fee3
commit 69a0098447
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
opsec/steghide/index.html
View File

@ -127,7 +127,7 @@ d56d71ecadf2137be09d8b1d35c6c042 output.pdf</samp></pre>
</ol>
<h3><b>Changing the encryption</b></h3>
<p>As you've seen, steghide needs a passphrase to embed and extract data. (Note: using an empty passphrase can lead to issues extracting.) This passphrase is used to both encrypt your file before embedding and to seed the PRNG by which it selects pixel positions for embedding data. By default, it uses AES-128. You should not rely on steghide for securing your data cryptographically (see the <a href="../index.html">introduction to steganography</a>), and when in doubt you can separately encrypt the file before embedding, but you may still want to change the used algorithm. For this, simply use <code class="nim">-e <i>algorithm</i> <i>mode</i></code>. You can list all available modes with <code class="nim">steghide encinfo</code>. So as example, to embed our previous picture using AES-256 in cipher feedback mode, you would use this:</p>
<p>As you've seen, steghide needs a passphrase to embed and extract data. (Note: using an empty passphrase can lead to issues extracting.) This passphrase is used to both encrypt your file before embedding and to seed the PRNG by which it selects pixel positions for embedding data. By default, it uses AES-128. You should not rely on steghide for securing your data cryptographically (see the <a href="../stegaography/index.html">introduction to steganography</a>), and when in doubt you can separately encrypt the file before embedding, but you may still want to change the used algorithm. For this, simply use <code class="nim">-e <i>algorithm</i> <i>mode</i></code>. You can list all available modes with <code class="nim">steghide encinfo</code>. So as example, to embed our previous picture using AES-256 in cipher feedback mode, you would use this:</p>
<pre><code class="nim">$ steghide embed -cf apod20240824.jpg -ef bitcoin.pdf -e rijandael-256 cfb </code></pre>