README.md

Mitnick

A Discord Bot that curbs the spread of unverified image in a Discord Server, with a special focus on security.
Contributors: Kyzyl, Kinshu, Srija, Nishtha Singhal and Nishtha Ahuja

Features

• Limits number of times an image can be forwarded.
• Role based information verification.
• Readers are cautioned when edited images are sent.

Build & Add Bot to Server

Instructions

• Install dependencies and genereate private and public keys
• Authorize access to your server follow steps at https://realpython.com/how-to-make-a-discord-bot-python/
• Add .env file with DISCORD_TOKEN= 'app_token'
• Run the bot

Commands

pip install discord.py dotenv python-dotenv pillow pycryptodomex numpy
python generateKey.py
python bot.py

Meet Mitnick, he processes every image sent in a channel to...

Caution readers about unverified information

Share the Original Sender of the image and the number of times it was forwarded

Retracts unverified images sent more than 5 times

Mark images sent by the admin as Verified

Cautions readers when images are edited forwards

Our Approach

To do his job Mitnick employs the following techniques:

• image steganography - LSB
• integrity check using hashing - SHA256
• Cryptosystem - RSA

Mitnick's Approach

Every time an image is sent:

if(checkIfHashPresent(image) == False):
    # hash not present .... i.e. new image
    nof = 0
    source = message.author.id
    #now storing message in image, hashing, encrypting hash and then appending to image
    stego.Encode(image, nof + source)
    hashToBeStored = Hash(image)
    encryptedHash = RSA.encrypt(hashToBeStored, publicKey)
    appendToImage(encryptedHash, image)
else: 
    #hash present
    if(checkIfHashValid(image) == True):
        #hash verified, integrity maintained
        nof, source = stego.decode(image)
        if(nof>5):
            #ignore image sent more than 5 times
            break
        nof++
        #now storing message in image, hashing, encrypting hash and then appending to image
        stego.Encode(image, nof + source)
        hashToBeStored = Hash(image)
        encryptedHash = RSA.encrypt(hashToBeStored, publicKey)
        appendToImage(encryptedHash, image)
    else:
        # hash not valid ...edited image... give caution... treat as new image
        nof = 0
        source = message.author.id
        #now storing message in image, hashing, encrypting hash and then appending to image
        stego.Encode(image, nof + source)
        hashToBeStored = Hash(image)
        encryptedHash = RSA.encrypt(hashToBeStored, publicKey)
        appendToImage(encryptedHash, image)