This content has been marked as final. Show 2 replies
By how much is the file size increasing? Depending on how you do the actual encryption, it can easily grow a bit due to varying headers and some padding, but it shouldn't be a significant part of the file size if the file is reasonably big.
If, however, the file size grows by some significant factor (say your output is 2 time the size of the input), then there is some problem that you should look into.