diff --git a/include/flags.h b/include/flags.h
index 8909945..e2b6937 100644
--- a/include/flags.h
+++ b/include/flags.h
@@ -32,7 +32,8 @@ typedef struct
 {
     char *outputText; //VARIABLE FOR ENCRYPTED/DECRYPTED TEXT
     char *usedKey; //VARIABLE FOR USED/GENERATED KEY
-    unsigned long unusedKeySize;
+    unsigned long unusedKeySize; //VARIABLE FOR COUNT OF UNUSED CHARACTERS IN KEY
+    unsigned long elapsedTime; //VARIABLE FOR ELAPSED TIME IN MICROSECONDS => 1s = 1000000µs
 } outputFlags;
 
 //VARIABLES
diff --git a/include/misc.h b/include/misc.h
index 2ac7776..5418111 100644
--- a/include/misc.h
+++ b/include/misc.h
@@ -1,6 +1,8 @@
 #ifndef WHY2_MISC_H
 #define WHY2_MISC_H
 
+#include <sys/time.h>
+
 #include <why2/flags.h>
 
 void checkVersion(inputFlags flags); //THIS FUNCTION CHECKS IF LATEST VERSION OF WHY2 IS USED
@@ -10,5 +12,6 @@ void checkKey(char *key, inputFlags flags); //CHECKS IF KEY IS VALID
 void checkText(char *text, inputFlags flags); //CHECKS IF TEXT IS VALID
 unsigned long countIntLength(int number); //RETURNS LENGTH OF number
 unsigned long countUnusedKeySize(char *text, char *key); //COUNT unusedKeySize
+unsigned long compareTimeMicro(struct timeval startTime, struct timeval finishTime); //COMPARE TIMES IN MICROSECONDS
 
 #endif
diff --git a/src/lib/decrypter.c b/src/lib/decrypter.c
index b5e4e00..b2e096c 100644
--- a/src/lib/decrypter.c
+++ b/src/lib/decrypter.c
@@ -3,12 +3,18 @@
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
+#include <sys/time.h>
 
 #include <why2/flags.h>
 #include <why2/misc.h>
 
 outputFlags decryptText(char *text, char *keyNew, inputFlags flags)
 {
+    //TIME VARIABLES
+    struct timeval startTime;
+    struct timeval finishTime;
+    gettimeofday(&startTime, NULL);
+
     //CHECK FOR INVALID text
     checkText(text, flags);
 
@@ -92,12 +98,16 @@ outputFlags decryptText(char *text, char *keyNew, inputFlags flags)
         returningText[i] = textKeyChain[i];
     }
 
+    //GET FINISH TIME
+    gettimeofday(&finishTime, NULL);
+
     //LOAD output
     outputFlags output =
     {
         returningText, //DECRYPTED TEXT
         key, //USED KEY
-        countUnusedKeySize(returningText, key)
+        countUnusedKeySize(returningText, key), // NUMBER OF UNUSED CHARS IN KEY
+        compareTimeMicro(startTime, finishTime) // ELAPSED TIME
     };
 
     //DEALLOCATION
diff --git a/src/lib/encrypter.c b/src/lib/encrypter.c
index 6c97b95..117e047 100644
--- a/src/lib/encrypter.c
+++ b/src/lib/encrypter.c
@@ -4,12 +4,19 @@
 #include <stdlib.h>
 #include <string.h>
 #include <math.h>
+#include <sys/time.h>
+#include <unistd.h>
 
 #include <why2/flags.h>
 #include <why2/misc.h>
 
 outputFlags encryptText(char *text, char *keyNew, inputFlags flags)
 {
+    //TIME VARIABLES
+    struct timeval startTime;
+    struct timeval finishTime;
+    gettimeofday(&startTime, NULL);
+
     //CHECK FOR INVALID text
     checkText(text, flags);
 
@@ -112,12 +119,16 @@ outputFlags encryptText(char *text, char *keyNew, inputFlags flags)
         }
     }
 
+    //GET FINISH TIME
+    gettimeofday(&finishTime, NULL);
+
     //LOAD output
     outputFlags output =
     {
         returningText, //ENCRYPTED TEXT
         key, //GENERATED/USED KEY
-        countUnusedKeySize(text, key) // NUMBER OF UNUSED CHARS IN KEY
+        countUnusedKeySize(text, key), // NUMBER OF UNUSED CHARS IN KEY
+        compareTimeMicro(startTime, finishTime) // ELAPSED TIME
     };
 
     //DEALLOCATION
diff --git a/src/lib/misc.c b/src/lib/misc.c
index 5d4a145..528927a 100644
--- a/src/lib/misc.c
+++ b/src/lib/misc.c
@@ -2,6 +2,7 @@
 
 #include <string.h>
 #include <unistd.h>
+#include <sys/time.h>
 
 #include <curl/curl.h>
 #include <json-c/json.h>
@@ -222,4 +223,9 @@ unsigned long countUnusedKeySize(char *text, char *key)
     }
 
     return returning;
+}
+
+unsigned long compareTimeMicro(struct timeval startTime, struct timeval finishTime)
+{
+   return (finishTime.tv_sec - startTime.tv_sec) * 1000000 + finishTime.tv_usec - startTime.tv_usec;
 }
\ No newline at end of file