diff --git a/cryptography.py b/cryptography.py
new file mode 100644
index 0000000..3c808e8
--- /dev/null
+++ b/cryptography.py
@@ -0,0 +1,86 @@
+from tkinter import *
+from tkinter import messagebox
+import base64
+import os
+
+def decrypt():
+    password = code.get()
+
+    if password == "1234":
+        screen2=Toplevel(screen)
+        screen2.title("decryption")
+        screen2.geometry("400x200")
+        screen2.configure(bg="#00bd56")
+
+        message = text1.get(1.0,END)
+        decode_message = message.encode("ascii")
+        base64_bytes = base64.b64decode(decode_message)
+        decrypt = base64_bytes.decode("ascii")
+
+        Label(screen2,text="DECRYPT",font="arial",fg="white",bg="#00bd56").place(x=10,y=0)
+        text2 = Text(screen2,font="Rpbote 10",bg="white",relief=GROOVE,wrap=WORD,bd=0)
+        text2.place(x=10,y=40,width=380,height=150)
+
+        text2.insert(END,decrypt)
+    elif password=="":
+        messagebox.showerror("encryption","Input password")
+
+    elif password != "1234":
+        messagebox.showerror("encryption","Invalid password")
+
+def encrypt():
+    password = code.get()
+
+    if password=="1234":
+        screen1=Toplevel(screen)
+        screen1.title("Encryption")
+        screen1.geometry("400x200")
+        screen1.configure(bg="#ed3833")
+
+        message = text1.get(1.0,END)
+        encode_message = message.encode("ascii")
+        base64_bytes = base64.b64encode(encode_message)
+        encrypt=base64_bytes.decode("ascii")
+
+        Label(screen1,text="ENCRYPT",font="arial",fg="white",bg="#ed3833").place(x=10,y=0)
+        text2 = Text(screen1,font="Rpbote 10",bg="white",relief=GROOVE,wrap=WORD,bd=0)
+        text2.place(x=10,y=40,width=380,height=150)
+
+        text2.insert(END,encrypt)
+    elif password=="":
+        messagebox.showerror("encryption","Input password")
+
+    elif password != "1234":
+        messagebox.showerror("encryption","Invalid password")
+
+def main_screen():
+
+    global screen
+    global code
+    global text1
+    screen = Tk()
+    screen.geometry("375x398")
+
+    # icon
+    screen.title("cryptography app")
+    def reset():
+        code.set("")
+        text1.delete(1.0,END)
+
+    Label(text = "Enter text for encryption and decription",fg="black",font=("calbri",13)).place(x=10,y=10)
+    text1 = Text(font="Robote 20",bg="white",relief = GROOVE,wrap=WORD,bd=0)
+    text1.place(x=10,y=50,width=355,height=100)
+
+    Label(text="Enter Secret key for ecncryption and decryption",fg="black",font=("calbri",13)).place(x=10,y=170)
+
+    code = StringVar()
+    Entry(textvariable = code,width=19,bd=0,font=("arial",25),show="*").place(x=10,y=200)
+
+    Button(text="ENCRYPT",height=2,width=23,bg="#ed3833",fg="white",bd=0,command = encrypt).place(x=10,y=250)
+    Button(text="DECRYPT", height=2, width=23, bg="#00bd56", fg="white", bd=0,command=decrypt).place(x=200, y=250)
+    Button(text="RESET", height=2, width=50, bg="#1089ff", fg="white", bd=0,command=reset).place(x=10, y=300)
+
+    screen.mainloop()
+
+
+main_screen()