def decryptInCTR(key,fileNameToDecrypt,nonce,fileNameToSavePT):
    ct = b64decode(getDataInBytes(fileNameToDecrypt))
    nonce = b64decode(nonce)
    cipher = AES.new(key, AES.MODE_CTR, nonce=nonce)
    start=timer()
    pt = cipher.decrypt(ct)
    end=timer()
    print("Time Taken to Decrypt is ",(end-start))
    print("Time Taken to Decrypt per byte is ",((end-start)/len(pt)))
    pt=pt.decode("utf-8")
    writeFile(pt,fileNameToSavePT)
    return pt

generateFiles()
key=generateKey(16)
kbData=getData("kbfile.txt")
mbData=getData("mbfile.txt")

nonce=encryptInCTR(key,kbData,"Encrypted_kbfile.txt")
ptKb=decryptInCTR(key,"Encrypted_kbfile.txt",nonce,"Decypted_kbfile.txt")

nonce=encryptInCTR(key,mbData,"Encrypted_mbfile.txt")
ptMb=decryptInCTR(key,"Encrypted_mbfile.txt",nonce,"Decypted_mbfile.txt")

if ptKb==kbData and ptMb==mbData:
    print("Encryption and decryption done successfully")
else:
    print("Error in Encryption and Decryption")