Image encryption and Decryption based on private-key cryptography

SecureSnaps
---| Enc
---| Dec
---| Temp

• max_val(ht,wdth) : returns max(ht,wdth)
• get_string_hash() : returns the hashvalue for the entered password
• generate_tuples(H,W) : generates a list of tuples recursively for the codec
• yield_chunks(block, iterate_size) : returns lists of varying size for the hash list

Encodes the image at image_path as per the entered password

Decodes the image at image_path as per the entered password

• fucntion(x) : The first function for generating tuples
• function2(x): The second function for generating tuples
• swap(ai,aj,bi,bj, image, arr) : swaps two pixels arr(ai,aj) with arr(bi, bj)
• efficiency(orig, enco, W, H) : Finds the efficiency of the encryption by comparing the original image with encoded image, W and H are width ad height respectively
• cascade(xy, N, W, H) : creates a recursively cascaded list (of length N) of tuples
• automate_swap(alpha, beta, N, image, arr) : swaps pixels automatically for encryption
• automate_swap_dec(alpha, beta, N, image, arr) : swaps pixels automatically for decryption

Step 1:		Start SecureSnaps
Step 2:		Select (Encrypt/Decrypt)
Step 3:		Input (folder_path, password)
Step 4:		Encrypts/Decrypts the images in the directory and removes the original images
Step 5:		End

• Add more cascade functions
• Increase the tuple size from 4 elements to 8
• Make the cascade functions non-linear