The content blade looks for matches to 3 pieces of information in close proximity of each other.
The content blade looks for:
ABA routing number
Banking words and phrases (e.g. aba, routing number, checking, savings)
Personally identifiable information (e.g. name, address, phone number)
Words and phrases related to banking are implemented in order to increase precision. A routing number is 9-digits and may pass for many different data types, for example, a valid US Social Security number, Canadian Social Insurance number or international telephone number.
Since routing numbers themselves are not sensitive, personally identifiable information is necessary for a violation to occur.