Re: @Sane ...
Are you an Equifax InfoSec employee? You're definitely not a cypher-Sherlock.
Doing what you suggest doesn't protect a database breach. Just because you freeze your information, doesn't mean the database automatically erases all the information stored there.
It also doesn't protect the way access is gained to this database by other DBs, systems, employees, etc.
I think you're reading the wrong books there, Nancy Drew.