7. The method as described in claim 1 wherein the given sensitivity criteria is a configurable threshold.
1. A method of identifying potential confidential information in a data item, the data item associated with a source, comprising: obtaining, from each of a set of alternative sources, a data item of a same type and format as the data item; comparing, using a hardware element, the data item to the data item(s) obtained from the set of alternative sources to identify occurrences of particular pieces of information in the data item, wherein multiple occurrences of a particular piece of information within a data item from each alternative source are treated as a single occurrence; and based on the occurrences of particular pieces of information in the data item and a given sensitivity criteria, and without knowledge that the particular pieces of information are considered by the source to be confidential, segmenting one or more pieces of information in the data item as representing the potential confidential information.