diff --git a/.gitignore b/.gitignore
index 0f3f690..eab0218 100644
--- a/.gitignore
+++ b/.gitignore
@@ -333,3 +333,4 @@ TSWLatexianTemp*
 # End of https://www.toptal.com/developers/gitignore/api/latex,visualstudiocode
 bib
 *.*-SAVE-ERROR
+*.ist
diff --git a/crypto.bib b/crypto.bib
new file mode 100644
index 0000000..1d38b1e
--- /dev/null
+++ b/crypto.bib
@@ -0,0 +1,13 @@
+@book{luenberger,
+  title={Information science},
+  author={Luenberger, David G},
+  year={2012},
+  publisher={Princeton University Press}
+}
+@misc{ enwiki:maryofscots,
+  author = "{Wikipedia contributors}",
+  title = "Mary, Queen of Scots --- {Wikipedia}{,} The Free Encyclopedia",
+  year = "2026",
+  url = "https://en.wikipedia.org/w/index.php?title=Mary,_Queen_of_Scots&oldid=1333198012",
+  note = "[Online; accessed 22-January-2026]"
+}
\ No newline at end of file
diff --git a/crypto.tex b/crypto.tex
index b2e701d..37900b0 100644
--- a/crypto.tex
+++ b/crypto.tex
@@ -15,7 +15,12 @@
 \PassOptionsToPackage{hyphens}{url}
 \usepackage{hyperref} % allows urls to follow line breaks of text
 \usepackage[style=ieee, backend=biber, maxnames=1, minnames=1]{biblatex}
-\addbibresource{entropy.bib}
+\addbibresource{crypto.bib}
+\usepackage{glossaries}
+\makeglossaries
+\newacronym{DES}{DES}{Data Encryption Standard}
+\newacronym{AES}{AES}{Advanced Encryption Standard}
+\newacronym{RSA}{RSA}{Rivest–Shamir–Adleman Encryption}
 
 
 
@@ -26,8 +31,26 @@
 
 \begin{document}
 \maketitle
+\section{Introduction}
+Cryptography is ubiquitous in our modern world.
+While the origins of cryptography date back thousands of years, evidence of its use in ancient is sparse.
+\cite{luenberger}
+Most of its use seemed to be reserved for political and military leaders, e.g. notably Mary Queen of Scots,
+who while in prison, plotted to kill Queen Elizabeth using encrypted letters \cite{enwiki:maryofscots}.
+With the widespread adoption of the internet, the need for several cryptographical functions arose.
+Due to its intended original use as a trusted research network (ARPANET),
+almost none of the original protocols were 'secure' in any sense of the word.
+Most notably still today is SMTP, the \textit{Simple Mail Transfer Protocol}, used to send email to servers.
+In its original implementation, it allowed attackers to intercept emails in transit to read and modify them
+and even spoof the sender address to impersonate others.
+SMTP today is secured using a combination of mitigations for these attacks, such as STARTTLS, SPF, DKIM and DMARC,
+emphasizing the need for securely designed protocols.
 \section{DES}
+The \acrfull{DES} 
 \section{AES}
 \section{RSA}
+\clearpage
+%\printglossary[type=\acronymtype]
+%\printglossary
 \printbibliography
 \end{document}