diff --git a/src/crypto.c b/src/crypto.c
index fbdcd07..fe9f83c 100644
--- a/src/crypto.c
+++ b/src/crypto.c
@@ -5,7 +5,7 @@
 #include <stdio.h>
 #include <time.h>
 #include <unistd.h>
-#include "otp.h"
+#include "main.h"
 
 #define PROGRESS_UPDATE_INTERVAL (64 * 1024 * 1024)  // 64MB intervals
 
diff --git a/src/entropy.c b/src/entropy.c
index 2462f70..4c2248d 100644
--- a/src/entropy.c
+++ b/src/entropy.c
@@ -16,7 +16,7 @@
 #include <fcntl.h>
 #include <math.h>
 #include "nostr_chacha20.h"
-#include "otp.h"
+#include "main.h"
 
 
 // In-place pad entropy addition using Chacha20 or direct XOR
diff --git a/src/main.c b/src/main.c
index 95af937..265be32 100644
--- a/src/main.c
+++ b/src/main.c
@@ -15,7 +15,7 @@
 #include <termios.h>
 #include <fcntl.h>
 #include <math.h>
-#include "otp.h"
+#include "main.h"
 
 int main(int argc, char* argv[]) {
     // Initialize terminal dimensions first
diff --git a/src/otp.h b/src/main.h
similarity index 98%
rename from src/otp.h
rename to src/main.h
index 4ec19ef..aa68afc 100644
--- a/src/otp.h
+++ b/src/main.h
@@ -1,12 +1,12 @@
-#ifndef OTP_H
-#define OTP_H
+#ifndef MAIN_H
+#define MAIN_H
 
 ////////////////////////////////////////////////////////////////////////////////
-//      OTP CIPHER - FUNCTION PROTOTYPES HEADER
+//      OTP CIPHER - MAIN HEADER FILE
 //      One Time Pad Implementation v0.2.109
-//      
-//      This header file contains all function prototypes extracted from otp.c
-//      Organized by functional categories for better maintainability
+//
+//      This header file contains all function prototypes and type definitions
+//      for the OTP Cipher project
 ////////////////////////////////////////////////////////////////////////////////
 
 #include <stdio.h>
@@ -335,4 +335,4 @@ char* select_pad_interactive(const char* title, const char* prompt, pad_filter_t
 // Help and usage display
 void print_usage(const char* program_name);
 
-#endif // OTP_H
\ No newline at end of file
+#endif // MAIN_H
\ No newline at end of file
diff --git a/src/otp.c b/src/otp.c
deleted file mode 100644
index aba19f5..0000000
--- a/src/otp.c
+++ /dev/null
@@ -1,35 +0,0 @@
-#define _POSIX_C_SOURCE 200809L
-#define _DEFAULT_SOURCE
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-#include <unistd.h>
-#include <sys/stat.h>
-#include <sys/statvfs.h>
-#include <sys/ioctl.h>
-#include <dirent.h>
-#include <time.h>
-#include <ctype.h>
-#include <termios.h>
-#include <fcntl.h>
-#include <math.h>
-#include "nostr_chacha20.h"
-#include "otp.h"
-
-
-#define MAX_INPUT_SIZE 4096
-#define MAX_LINE_LENGTH 1024
-#define MAX_HASH_LENGTH 65
-#define PROGRESS_UPDATE_INTERVAL (64 * 1024 * 1024)  // 64MB intervals
-#define DEFAULT_PADS_DIR "pads"
-#define FILES_DIR "files"
-
-////////////////////////////////////////////////////////////////////////////////
-////////////////////////////////////////////////////////////////////////////////
-//      GLOBAL VARIABLES
-///////////////////////////////////////////////////////////////////////////////
-////////////////////////////////////////////////////////////////////////////////
-
-char current_pads_dir[512] = DEFAULT_PADS_DIR;
diff --git a/src/pads.c b/src/pads.c
index d8ce78d..216dc67 100644
--- a/src/pads.c
+++ b/src/pads.c
@@ -16,7 +16,7 @@
 #include <fcntl.h>
 #include <math.h>
 #include <errno.h>
-#include "otp.h"
+#include "main.h"
 
 
 // Extracted pad management functions from otp.c
diff --git a/src/state.c b/src/state.c
index b46494f..3adb54d 100644
--- a/src/state.c
+++ b/src/state.c
@@ -1,6 +1,6 @@
 #include <string.h>
 #include <stdlib.h>
-#include "otp.h"
+#include "main.h"
 
 // Global state variables
 static char current_pads_dir[512] = DEFAULT_PADS_DIR;
diff --git a/src/trng.c b/src/trng.c
index c5e28f9..1967908 100644
--- a/src/trng.c
+++ b/src/trng.c
@@ -17,7 +17,7 @@
 #include <math.h>
 #include <errno.h>
 #include "nostr_chacha20.h"
-#include "otp.h"
+#include "main.h"
 
 // Basic TrueRNG entropy collection function
 int collect_truerng_entropy(unsigned char* entropy_buffer, size_t target_bytes, size_t* collected_bytes, int display_progress) {
diff --git a/src/ui.c b/src/ui.c
index df2779f..5e1219f 100644
--- a/src/ui.c
+++ b/src/ui.c
@@ -15,7 +15,7 @@
 #include <termios.h>
 #include <fcntl.h>
 #include <math.h>
-#include "otp.h"
+#include "main.h"
 
 // Initialize terminal dimensions
 void init_terminal_dimensions(void) {
diff --git a/src/util.c b/src/util.c
index 173d25e..2c35cfe 100644
--- a/src/util.c
+++ b/src/util.c
@@ -15,7 +15,7 @@
 #include <termios.h>
 #include <fcntl.h>
 #include <math.h>
-#include "otp.h"
+#include "main.h"
 
 // Global variables for preferences
 static char default_pad_path[1024] = "";