Cisco Cisco Email Security Appliance C160 Mode D'Emploi

rendered in a way that makes it difficult for the scanning engine to determine word and line breaks. When 
you attempt to match a regular expression against a PDF file constructed in this way, the scanning engine 
may return unexpected results. 

 For example, you enter a word in a PowerPoint document that uses different fonts and different font 
sizes for each letter in the word. When a scanning engine reads a PDF generated from this application, 
it inserts logical spaces and line breaks. Because of the construction of the PDF, it may interpret the word 
“callout” as  “call out” or “c a l lout.” Attempting to match either of these renderings against the regular 
expression, “callout,” would result in no matches. 

When you use message rules that scan message content, you can use smart identifiers to detect certain 
patterns in the data. 

 Smart identifiers can detect the following patterns in data:

Credit card numbers

U.S. Social Security numbers

Committee on Uniform Security Identification Procedures (CUSIP) numbers

 American Banking Association (ABA) routing numbers

To use smart identifiers in a filter, enter the following keywords in a filter rule that scans body or 
attachment content:

When you use a smart identifier in a filter rule, enter the smart-identifier keyword in quotes within a filter 
rule that scans the body or attachment file, as in the example below:

*credit

Credit card number

Identifies 14-, 15-, and 16- digit credit 
card numbers. 

NOTE: The smart identifier does not 
identify enRoute or JCB cards.

*aba

ABA routing number

Identifies ABA routing numbers.

*ssn

Social security number

Identifies U.S. social security 
numbers. The *ssn smart identifier 
identifies social security numbers with 
dashes, periods and spaces.

*cusip

CUSIP number

Identifies CUSIP numbers.

ID_Credit_Cards:

if(body-contains("*credit")){