diff --git a/iPDC/Attack_detect.c b/iPDC/Attack_detect.c
new file mode 100644
index 0000000..e6ca3db
--- /dev/null
+++ b/iPDC/Attack_detect.c
@@ -0,0 +1,30 @@
+#include "Attack_detect.h"
+#include "parser.h"
+
+/* pavan changes */
+void attack_detect(struct data_frame *df,clock_t START)
+{
+    float CURR_FREQ=to_intconvertor(df->dpmu[0]->freq);
+	SUM_OF_FREQUENCY+=CURR_FREQ;
+	COUNT=0;
+	float FREQ_AVG=SUM_OF_FREQUENCY/(COUNT*1.0f);
+	float DETECT_PERCENT=(abs(FREQ_AVG-CURR_FREQ)/(FREQ_AVG*1.0f))*100;
+    double END = clock();
+
+	printf("Detect_percent: %f\n",DETECT_PERCENT);
+
+	if(DETECT_PERCENT>THRESHOLD)
+		printf("ATTACK DETECTED\n");
+	else
+		printf("NO PROBLEM\n");
+
+    cpu_time_used = ((double) (END - START)) / CLOCKS_PER_SEC;
+
+    if(cpu_time_used > 10)
+    {
+        START = 0;
+        SUM_OF_FREQUENCY=CURR_FREQ;
+        COUNT=1;
+    }
+}
+/* pavan changes */
\ No newline at end of file
diff --git a/iPDC/Attack_detect.h b/iPDC/Attack_detect.h
new file mode 100644
index 0000000..b5b9f1b
--- /dev/null
+++ b/iPDC/Attack_detect.h
@@ -0,0 +1,14 @@
+/* pavan changes */
+#include <time.h>
+
+/* variables declared */
+float SUM_OF_FREQUENCY=0;
+float COUNT=0;
+float THRESHOLD=25;
+double cpu_time_used;
+
+
+/* functions declared */
+void attack_detect(struct data_frame *df,clock_t START);
+
+/* pavan changes */
\ No newline at end of file
diff --git a/iPDC/parser.c b/iPDC/parser.c
index a28d22f..711792f 100755
--- a/iPDC/parser.c
+++ b/iPDC/parser.c
@@ -54,6 +54,7 @@
 #include  <stdlib.h> 
 #include  <pthread.h>
 #include  <stdint.h>
+#include  <time.h>
 #include  "parser.h"
 #include  "global.h" 
 #include  "dallocate.h" 
@@ -61,6 +62,7 @@
 #include  "connections.h"
 #include  "recreate.h"
 #include  "utility_tools.h"
+#include  "Attack_detect.h"
 
 /* ----------------------------------------------------------------------------	*/
 /* FUNCTION  cfgparser():                                	     		*/
@@ -1269,8 +1271,15 @@ int dataparser(unsigned char data[]) {
 		//No match for configuration frame
 		printf("Configuration is not fresent for received data frame!\n");	
 	}  
-	printf("freq = %d\n",to_intconvertor(df->dpmu[0]->freq));
+	
+	/*pavan changes*/
+	//#include "Attack_detect.h"
+	//clock_t START = clock();
+	//attack_detect(df,START);
+	/*pavan changes*/
+
 	// temp code 
+	/* karthik changes*/
 	int freq = to_intconvertor(df->dpmu[0]->freq);
 	if(util_map != NULL){
 		g_red_image = gdk_pixbuf_new_from_file_at_size ("red.png", 24,24,NULL);
@@ -1286,6 +1295,7 @@ int dataparser(unsigned char data[]) {
 		gtk_widget_show_all(GTK_WIDGET(util_map));
 
 	}
+	/* karthik changes */
 
 	if((config_change == 14) ||(config_change == 10)) 
 		return config_change;