title: Electronic signature PDF Android
body: <p>I need to make an app where you will open a PDF document, show it to a customer and he will electronically sign it(write his signature on a tablet). </p>
  
  <p>From what I read you need the data from the signature being created (time stamp, pressure and time from drawing) and attach it to the PDF. </p>
  
  <p>But is this enough? So to open a canvas, read the data and attach it to the PDF with the signature image itself or do I need to digitally sign the PDF as well? If this is it enough, then where to attach all that additional data(time stamp...)? - I plan on using itext library.</p>