{"id":3493,"date":"2022-03-28T09:53:58","date_gmt":"2022-03-28T09:53:58","guid":{"rendered":"http:\/\/myprojectideas.com\/?p=3493"},"modified":"2025-11-01T11:51:40","modified_gmt":"2025-11-01T11:51:40","slug":"encode-and-decode-messages-using-tkinter-module","status":"publish","type":"post","link":"https:\/\/rudelabs.ai\/blogs\/encode-and-decode-messages-using-tkinter-module\/","title":{"rendered":"Encode and Decode Messages Using Tkinter Module"},"content":{"rendered":"<h2><strong>Introduction of the Project<\/strong><\/h2>\n<p>Do you like cryptography? Encryption &#8211; decryption techniques make you feel worth digging deeper into? If yes, today, we will implement the Caesar Cipher to encrypt and decrypt the message along with some GUI using the Tkinter module. To encode and decode messages using the Tkinter module, let us know a bit about the Caesar cipher before implementing it.<\/p>\n<p>Caesar cipher is based on shifting the alphabets by a fixed number known as the key to get an encrypted or, say, encoded message and reverse it to get decrypted or decoded message. Some terminologies:<\/p>\n<ul>\n<li>Original message = PlainText = Decrypted\/ Decoded message<\/li>\n<li>Cyphertext = Encrypted\/Encoded message<\/li>\n<li>A numeric key is used to convert from first to second and vice versa.<\/li>\n<\/ul>\n<iframe loading=\"lazy\"  id=\"_ytid_39954\"  width=\"1080\" height=\"607\"  data-origwidth=\"1080\" data-origheight=\"607\" src=\"https:\/\/www.youtube.com\/embed\/pMZXTAqAglA?enablejsapi=1&autoplay=0&cc_load_policy=0&cc_lang_pref=&iv_load_policy=1&loop=0&rel=1&fs=1&playsinline=0&autohide=2&theme=dark&color=red&controls=1&\" class=\"__youtube_prefs__  no-lazyload\" title=\"YouTube player\"  allow=\"fullscreen; accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen data-no-lazy=\"1\" data-skipgform_ajax_framebjll=\"\"><\/iframe>\n<p>&nbsp;<\/p>\n<h2><strong>Requirements<\/strong><\/h2>\n<p>1. <a href=\"https:\/\/www.python.org\/downloads\/release\/python-390\/\">Python 3.9 interpreter<\/a>, you can use VSCode or any python IDE.<\/p>\n<p><strong><em>NOTE: A certain file needs to be preinstalled for the code\u2019s smooth running, due to which IDLE or IDE is a preferred choice.<\/em><\/strong><\/p>\n<p>2. Pre-installed Tkinter module to create GUI.<\/p>\n<h2><strong>Steps To Encode And Decode Messages With Python Using Tkinter Module<\/strong><\/h2>\n<p><strong>Step 1: <\/strong>Do the following as per your Operating System:<\/p>\n<p>Windows: Open Command Prompt and type<\/p>\n<p>macOS: Open Terminal and type<\/p>\n<p><strong><em>pip3 install tk<\/em><\/strong><\/p>\n<p><em>Installing Tkinter<\/em><\/p>\n<p><strong>Step 2: <\/strong>Paste the below piece of code in your editor\/IDE.<\/p>\n<h2><strong>Source Code<\/strong><\/h2>\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"python\"># Import the module for GUI\r\n\r\nimport tkinter as tk\r\n\r\n\r\n\r\n\r\n# Initialising the font type and size\r\n\r\nFONT = (\"timesnewroman\", 25, \"bold\")\r\n\r\n\r\n\r\n\r\n\r\n\r\n\r\nclass CaesarCypherGUI:\r\n\r\n\u00a0\u00a0\u00a0 def __init__(self, master):\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # Title for the window\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 master.title(\"Caesar Cypher GUI\")\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # String type for plaintext and cyphertext\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plaintext = tk.StringVar(master, value=\"\")\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cyphertext = tk.StringVar(master, value=\"\")\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # Integer value for the key\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.key = tk.IntVar(master)\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # Plaintext GUI and controls\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_label = tk.Label(master, text=\"Plaintext\", fg=\"green\", font=FONT).grid(row=0, column=0)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_entry = tk.Entry(master, textvariable=self.plaintext, width=40, font=FONT)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_entry.grid(row=0, column=1, padx=20)\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # Button constructs a button\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.encrypt_button = tk.Button(master, text=\"Encrypt\", command=lambda: self.encrypt_callback(), font=FONT).grid(row=0, column=2)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_clear = tk.Button(master, text=\"Clear\", command=lambda: self.clear('Plain'), font=FONT).grid(row=0, column=3)\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # Key controls\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.key_label = tk.Label(master, text=\"Key\", font=FONT).grid(row=1, column=0)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.key_entry = tk.Entry(master, textvariable=self.key, width=10, font=FONT).grid(row=1, column=1, sticky=tk.W, padx=20)\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 # Cyphertext controls\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_label = tk.Label(master, text=\"Cyphertext\", fg=\"red\", font=FONT).grid(row=2, column=0)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_entry = tk.Entry(master, textvariable=self.cyphertext, width=40, font=FONT)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_entry.grid(row=2, column=1, padx=20)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.decrypt_button = tk.Button(master, text=\"Decrypt\", command=lambda: self.decrypt_callback(), font=FONT).grid(row=2, column=2)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_clear = tk.Button(master, text=\"Clear\", command=lambda: self.clear('Cypher'), font=FONT).grid(row=2, column=3)\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0 # Defination of clear function\r\n\r\n\u00a0\u00a0\u00a0 def clear(self, str_val):\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if str_val == 'cypher':\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_entry.delete(0, 'end')\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 elif str_val == 'plain':\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_entry.delete(0, 'end')\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0 # Defination of key function\r\n\r\n\u00a0\u00a0\u00a0 def get_key(self):\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 try:\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 key_val = self.key.get()\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 return key_val\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 except tk.TclError:\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 pass\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0 # Encryption method\r\n\r\n\u00a0\u00a0\u00a0 def encrypt_callback(self):\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 key = self.get_key()\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0cyphertext = encrypt(self.plain_entry.get(), key)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_entry.delete(0, tk.END)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.cypher_entry.insert(0, cyphertext)\r\n\r\n\r\n\r\n\r\n\u00a0\u00a0\u00a0 # Decryption method\r\n\r\n\u00a0\u00a0\u00a0 def decrypt_callback(self):\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 key = self.get_key()\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 plaintext = decrypt(self.cypher_entry.get(), key)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_entry.delete(0, tk.END)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 self.plain_entry.insert(0, plaintext)\r\n\r\n\r\n\r\n\r\n# Encryption formula of Caeser cipher\r\n\r\ndef encrypt(plaintext, key):\r\n\r\n\u00a0\u00a0\u00a0 cyphertext = \"\"\r\n\r\n\u00a0\u00a0\u00a0 for char in plaintext.upper():\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if char.isalpha():\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cyphertext += chr((ord(char) + key - 65) % 26 + 65)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else:\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 cyphertext += char\r\n\r\n\u00a0\u00a0\u00a0 return cyphertext\r\n\r\n\r\n\r\n\r\n# Decryption formula of Caser cipher\r\n\r\ndef decrypt(cyphertext, key):\r\n\r\n\u00a0\u00a0\u00a0 plaintext = \"\"\r\n\r\n\u00a0\u00a0\u00a0 for char in cyphertext.upper():\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if char.isalpha():\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 plaintext += chr((ord(char) - key - 65) % 26 + 65)\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else:\r\n\r\n\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 plaintext += char\r\n\r\n\u00a0\u00a0\u00a0 return plaintext\r\n\r\n\r\n\r\n\r\n# Run the program\r\n\r\nif __name__ == \"__main__\":\r\n\r\n\u00a0\u00a0\u00a0 root = tk.Tk()\r\n\r\n\u00a0\u00a0\u00a0 caesar = CaesarCypherGUI(root)\r\n\r\n\u00a0\u00a0\u00a0 root.mainloop()<\/pre>\n<h2><strong>Explanation Of The Code<\/strong><\/h2>\n<p>To begin with, we have imported the Tkinter module.<\/p>\n<p>1. Then, we have initialized the font type and size of the text in the window.<\/p>\n<p>2. After that, we used the title function to give the window&#8217;s title.<\/p>\n<p>3. Then, we constructed a sting and integer variable for the cryptographical text and key.<\/p>\n<p>4. Then, we have used the label, Entry, &amp; button function for the control of the GUI of Plaintext, key, and ciphertext.<\/p>\n<p>5. Then, we have written the definition for the clear and key function to clear the textbox and get the key.<\/p>\n<p>6. After this, we have implemented the formula of encryption and decryption of Caesar cipher using python.<\/p>\n<p>7. At last, we are running the application.<\/p>\n<h2><strong>Output<\/strong><\/h2>\n<p>The below snip shows the window of encoding decoding GUI that we have implemented using the Tkinter module.<\/p>\n<p>1. Encryption using Caeser cipher and Tkinter module in python<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-18416 size-full\" src=\"https:\/\/rudelabs.ai\/blogs\/wp-content\/uploads\/2022\/03\/Encode-and-Decode-Messages-Using-Tkinter-Module-Encryption.webp\" alt=\"Encode and Decode Messages Using Tkinter Module\" width=\"1212\" height=\"206\" \/><\/p>\n<p>2. Decryption using Caeser cipher and Tkinter module in python<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone wp-image-18417 size-full\" src=\"https:\/\/rudelabs.ai\/blogs\/wp-content\/uploads\/2022\/03\/Encode-and-Decode-Messages-Using-Tkinter-Module-Decryption.webp\" alt=\"Encode and Decode Messages Using Tkinter Module\" width=\"1210\" height=\"208\" \/><\/p>\n<h2><strong>Conclusion<\/strong><\/h2>\n<p>Using the Tkinter module and some basic python functions, we have implemented cryptography for encoding and decoding messages using caesar cipher along with its GUI.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Python Program to encode and decode messages using the Tkinter module. We will use the Caesar Cipher to implement this python code.<\/p>\n","protected":false},"author":1,"featured_media":8381,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":"","footnotes":""},"categories":[7,5],"tags":[22,24],"class_list":["post-3493","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coding-projects","category-python","tag-python","tag-tkinter-module"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.1.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Encode and Decode Messages Using Tkinter Module - RUDE LABS<\/title>\n<meta name=\"description\" content=\"Python Program to encode and decode messages using the Tkinter module. 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