Many would consider me an Internet Old Timer.  I used ‘The Internet’; then ARPAnet back in the days when I worked as a Software Engineer for a US defense contractor. Securing communications and having confidence in message integrity; both in the identity of the sender and in the integrity in the content have always been important if not vital to communications over the Internet.  I was struck by this blog post in part because I have heard of Filippo’s work but most of all because I completely agree with his message.