Informatica encrypts sensitive data before it stores the data in the Informatica repositories.
When you create a domain, you must specify the encryption key directory. The installer generates an encryption key file named siteKey and stores it in a default directory or the directory you specify. All nodes in a domain must use the same encryption key.
The installer also generates a unique site key. If you lose the site key, you cannot generate the site key again. Make sure that you save a copy of this key and do not share the unique site key with others.