Auditing network storage with OpenAntiVirus

Hello, I would like some advice on an idea I have.  I want to create an 
application that will help my company audit our network storage to ensure 
that we are not storing private customer data in any accessable files.

For example, my idea is to search files for signatures of credit card 
numbers (maybe addresses etc).  Since I am basically looking for patterns 
that might be a credit card number, I thought that this would essentially be 
a virus scanner that isn't looking for viruses.

I found OpenAntiVirus (open source virus scanner) and I am wondering if it 
seems that using OpenAntiVirus would be suited to this type of application, 
or am I choosing the wrong kind of solution.




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