As an option, you can encrypt data files with PGP encryption when sending them to Audience Manager.
Follow the steps outlined below to encrypt inbound data files.
Download the Audience Manager public key (https://marketing.adobe.com/resources/help/en_US/aam/downloads/adobe_pgp.pub).
Import the public key to your trusted store.
For example, if you use GPG, the command could be similar to the following:
gpg --import adobe_pgp.pub
You should see a message similar to the following:
pub 4096R/8496CE32 2013-11-01 uid Adobe AudienceManager sub 4096R/E3F2A363 2013-11-01
Encrypt the inbound data using the following command:
gpg --recipient "Adobe AudienceManager" --cipher-algo AES --output $output.gpg --encrypt $inbound
All encrypted data must use .pgp or .gpg as the file extension (e.g. ftp_dpm_100_123456789.sync.pgp or ftp_dpm_100_123456789.overwrite.gpg).