Content Scanning:
When using content scanning, the encryption process happens transparently without requiring any initiation from you when you send an email from your standard email program. The content of all email messages sent, including subject line, message body and attachments is scanned and compared against the policies we have implemented.
Keyword Triggered:
With keyword triggered encryption, you are responsible for identifying sensitive information within the body and attachments of your email, and typing that keyword within the subject line or body of the email. To send an encrypted email, enter "secure" in the subject and the content is encrypted before it leaves our corporate network