This important technology is now poised to take off. Get on board at your earliest opportunity. You get a DID from an independent certificate authority such as VeriSign, which performs a background check first. DIDs require software on both server and client. After a long wait, that technology is now widely available.
Most Web servers have it already.
Most email programs will have it by the end of the year. DIDs protect companies, Web sites and individuals from electronic impersonation. You know for sure that you've really logged onto your bank's site, not a clever impostor. Your bank knows for sure that it's really you, so it can safely let you look at your financial records. Well over half a million people have DIDs already.