The size of those formats are: PNG 3kb, GIF 2kb and JPEG 6kb. From this pictures we can tell that jpeg has a lot of extra pixels around the letters which requires more space than the other formats. We can tell that this would be very useful if this was a photograph which has high resolution but for our purpose it makes things look messy and on top of that requires a lot of space. There is no noncable difference between png and gif apart from the size. So best choice is to go with gif just because it requires 1kb less of space.

There are two protocols used to send data over that provide confidentiality, integrity and authenticity over network connection. I had to choose one of those to make my connection with google servers. So I done a research on those two protocols to make an …show more content…
This is only a prototype and if this data was sent through the internet this would insure that a hacker couldn’t read the message. The disadvantage is it will need more space to store in the database and it will be a bit slower when you sending it to the database. When choosing the right cryptography, we are faced with a tough decision due to the fact we have so many different choices. Let’s start by looking at two main groups of cryptography: symmetric and asymmetric encryption. For this propose it is easy to decide which of those two we will be using because the application will be communicating with a local database and there will be no need to verify the identity to make a connection and the database will not be required to decrypt this data therefore only one key will be required which will be held by the application. We will be going with symmetric which only needs one key and it is much faster in encrypting/decrypting in comparison to asymmetric encryption. This key will encrypt the password so that if someone has a look in a database he will not be able to read the