I have been searching the internet to find a way to encrypt files and
then decrypt the back… What I found is how to encrypt a string of text
and then decrypt it back.
For exampe you have a
plaintext = “some text”
you encrypt it into a ciphertext and then how to decrypt it back.
What I want to do is to encrypt a whole file, files like .doc, .docx,
.xls, .pps and so on. Basically any file either this is a document, a
photo or whatever.
Any help on how to achieve this. I found a library ‘ChilKat’ but you
need to purchase a license to do this.
Any help is much appreciated!