Casual vs. Protected Personal Data

Casual: Information that is normally freely available, which tells you a bit about a person, but is extremely shallow. A real life example would be walking by someone on the street. You would be able to infer information about someone, possibly even as deep as their name. But in the end, you know very little. There needs not be any implied trust to give/receive this info.

Protected: This is information that people choose to give out or to hold back. Credit cards, full address, phone number, weight, family names, sexual orientation, etc. Most of this information is given out ot many places daily, but there is an implied trust that the information will not be broadcasted. The main gate is the trust and choice based on that trust.

The interesting thing about this data is that when trying to complete a complex transaction, both types of information are needed. Very few stores will accept a credit card payment from a white teenage girl using the credit card of Mohammed Al Jabaar. What I would suggest is to create a system online that would seperate the two types of info. The casual information being collected is stored at each site, with the protected info being stored either on a user's computer or on a trusted website. The two types of content would be matched up using a key that each user keeps (fingerprint, complex password, etc).

The key to this system is that each group of information is useless without the other, making privacy and hacking less of an issue.