Hi all,

 

I am searching to develop a very simple tool that adds a digital signature to a pdf document and encrypts this document using a 128 bit certificate (I think this is it, the objective is to assure the document isn't changed, or if it is, it looses certification..?). In order to spend less time investigating thoroughly the various solutions, I just would like to know if this is possible with iText and where should I start. Forgive me for my lazyness, but as a matter a fact, I have searched for this answer in the site but couldn't find it...