diff --git a/chapters/0.preamble/0.4.toc.tex b/chapters/0.preamble/0.4.toc.tex
index 67f93b1..9fd8e19 100644
--- a/chapters/0.preamble/0.4.toc.tex
+++ b/chapters/0.preamble/0.4.toc.tex
@@ -1 +1 @@
-\tableofcontents
\ No newline at end of file
+\tableofcontents\label{toc}
\ No newline at end of file
diff --git a/chapters/1.introduction/1.0.introduction.tex b/chapters/1.introduction/1.0.introduction.tex
index 1550451..523db09 100644
--- a/chapters/1.introduction/1.0.introduction.tex
+++ b/chapters/1.introduction/1.0.introduction.tex
@@ -1,4 +1,4 @@
-\chapter{Εισαγωγή}
+\chapter{Εισαγωγή}\label{chapter:1-introduction}
 
 \input{chapters/1.introduction/1.1.general}
 \input{chapters/1.introduction/1.2.decentralization}
diff --git a/chapters/1.introduction/1.6.document-structure.tex b/chapters/1.introduction/1.6.document-structure.tex
index 17f0ffa..c61a53b 100644
--- a/chapters/1.introduction/1.6.document-structure.tex
+++ b/chapters/1.introduction/1.6.document-structure.tex
@@ -1,3 +1,11 @@
 \section{Οργάνωση κεφαλαίων}
 
-Στο δεύτερο κεφάλαιο γίνεται παρουσίαση του θεωρητικού υπόβαθρου...
\ No newline at end of file
+Η παρούσα διπλωματική εργασία οργανώνεται σε κεφάλαια, ενότητες και υποενότητες, όπως αυτά παρατίθενται στα \hyperref[toc]{Περιεχόμενα}. Πιο συγκεκριμένα:
+
+\begin{itemize}
+	\item Στο \hyperref[chapter:1-introduction]{\textbf{Κεφάλαιο 1}}
+	\item Στο \hyperref[chapter:2-theoretical-background]{\textbf{Κεφάλαιο 2}}
+	\item Στο \hyperref[chapter:3-application-design]{\textbf{Κεφάλαιο 3}}
+	\item Στο \hyperref[chapter:4-application-implementation]{\textbf{Κεφάλαιο 4}}
+	\item Στο \hyperref[chapter:5-conclusions]{\textbf{Κεφάλαιο 5}}
+\end{itemize}
\ No newline at end of file
diff --git a/chapters/2.theoretical-background/2.0.theoretical-background.tex b/chapters/2.theoretical-background/2.0.theoretical-background.tex
index 0b2e43f..8db6c15 100644
--- a/chapters/2.theoretical-background/2.0.theoretical-background.tex
+++ b/chapters/2.theoretical-background/2.0.theoretical-background.tex
@@ -1,4 +1,4 @@
-\chapter{Θεωρητικό υπόβαθρο}
+\chapter{Θεωρητικό υπόβαθρο}\label{chapter:2-theoretical-background}
 
 \input{chapters/2.theoretical-background/2.1.hash-functions}
 \input{chapters/2.theoretical-background/2.2.asymmetric-cryptography}
diff --git a/chapters/3.application-design/3.0.application-design.tex b/chapters/3.application-design/3.0.application-design.tex
index 8f9cf50..abcd5cc 100644
--- a/chapters/3.application-design/3.0.application-design.tex
+++ b/chapters/3.application-design/3.0.application-design.tex
@@ -1,4 +1,4 @@
-\chapter{Σχεδίαση εφαρμογής}
+\chapter{Σχεδίαση εφαρμογής}\label{chapter:3-application-design}
 
 \input{chapters/3.application-design/3.1.application-parts}
 \input{chapters/3.application-design/3.2.user-categories}
diff --git a/chapters/4.application-implementation/4.0.application-implementation.tex b/chapters/4.application-implementation/4.0.application-implementation.tex
index df2cd3e..f75b58c 100644
--- a/chapters/4.application-implementation/4.0.application-implementation.tex
+++ b/chapters/4.application-implementation/4.0.application-implementation.tex
@@ -1,4 +1,4 @@
-\chapter{Υλοποίηση εφαρμογής}
+\chapter{Υλοποίηση εφαρμογής}\label{chapter:4-application-implementation}
 
 \input{chapters/4.application-implementation/4.1.implemented-parts}
 \input{chapters/4.application-implementation/4.2.implementation-methodology}
diff --git a/chapters/5.conclusions/5.0.conclusions.tex b/chapters/5.conclusions/5.0.conclusions.tex
index 5990f14..37ef4bb 100644
--- a/chapters/5.conclusions/5.0.conclusions.tex
+++ b/chapters/5.conclusions/5.0.conclusions.tex
@@ -1,4 +1,4 @@
-\chapter{Συμπεράσματα}
+\chapter{Συμπεράσματα}\label{chapter:5-conclusions}
 
 \input{chapters/5.conclusions/5.1.problems-faced}
 \input{chapters/5.conclusions/5.2.design-implementation-differences}
diff --git a/thesis.pdf b/thesis.pdf
index dff7074..6a3415b 100644
Binary files a/thesis.pdf and b/thesis.pdf differ