Here's a tutorial with a couple different ways: http://www.howtogeek.com/164668/how-to-e...ning-them/
Or if you've got a Mac see this one: http://www.macrumors.com/how-to/digitall...ew-on-mac/
But, uh... it's really suspicious you'd ask a question answered by a link in your signature to a commercial product. Backlink building much? ...you're not even building with a good keyword. The phrase "digital signature" is used in computing to mathematically verify the integrity of digital data. Nothing to do with old-fashioned signing of your name.
Or if you've got a Mac see this one: http://www.macrumors.com/how-to/digitall...ew-on-mac/
But, uh... it's really suspicious you'd ask a question answered by a link in your signature to a commercial product. Backlink building much? ...you're not even building with a good keyword. The phrase "digital signature" is used in computing to mathematically verify the integrity of digital data. Nothing to do with old-fashioned signing of your name.