I've attended security conferences in the past two years wherein representatives of companies that claim to see 80+ percent of all Internet traffic in their threat intel offerings who were presenting about Android malware reverse engineering used short IDs in their slide deck and business cards.
When I mentioned Evil32 to them, they looked at a loss.
If this is news to you, don't feel bad. Many infosec conference speakers don't do this right either, and those are the sorts of people you'd expect to get this right.
I've written software to help me create QR codes for my business card, including PGP, address, web site etc. There are many gotchas, some apps ignore some VCard fields, hence it puts copies into generic comment fields, too. Seems to work OK now. Maybe I should turn this into a web service.
When I mentioned Evil32 to them, they looked at a loss.
https://evil32.com
If this is news to you, don't feel bad. Many infosec conference speakers don't do this right either, and those are the sorts of people you'd expect to get this right.