I have recently come out of a meeting with a VoIP sales agent. He mentioned that we would receive eFax with the phones which is, in his words, “…more secure then analog faxing” when I asked him, how it was more secure he mentioned that one of his co-workers was able to access all the data on an analog line within minutes and see everything on the network.
So I mentioned SSL encryption, and it would obviously be possible to see the data if you man-in-the-middle the network with a rogue access point.
However I am not entirely sure if it is possible to encrypt faxes or not. So my question is, this, why is eFax more secure then analog fax (regular faxing) and what security measures can you take to encrypt faxes?