Wow, for all your ability to rant, your two ideas are so humdrum I can barely believe you offered them as "unsolved" examples. Microsoft Passport and 1000 diffe

Wow, for all your ability to rant, your two ideas are so humdrum I can barely believe you offered them as "unsolved" examples. Microsoft Passport and 1000 different anti-malware programs have been around for a long time. The first one failed because no sane person would ever trust such a thing.