Create a dictionary definition based on a lowercase keyword and add it to a classification.
In ePO - On-prem, go to Classification → Definitions → Dictionary and click Actions → New Item.
Give the dictionary definition a name and an optional description, then click Actions → Add.
In Phrase, type the word
security, then set the Score as 1 and select Case Sensitive to only match on the keyword when it is lowercase.Click Add, then click Save.
Select Classification → New Classification. Give the classification a name, add an optional description, and click OK.
Select the newly created classification and click Action → New Content Classification Criteria.
Select the dictionary and use the comparison (OR/AND/NOT).
Click (…) and select the dictionary definition you recently created, give it a threshold of 10 and click OK.
Assign the classification to a rule to trigger the classification.