How fic will change with password ?? (1 reply)

I have 7 fic files without Password . (This means I have not put any password while using HCreationIfNotFound) . The Size of those 7 files is 51.7 Mb. Creating the zip file containing those 7 files will result the file of size 10.4 Mb

Then I used HChangePassword for those files . All files have same password. The size of those 7 fic files is still 51.7 Mb. But Creating the zip file containing those files will result the file of size 49 Mb.

In both case i have used 7zip for compression .
Anyone experienced this before ??

Now the question is why the size of zip file is so different ?? How Fic file will change with password ??