Yes! has invested a lot of time and resources to build PS in the most secure way possible. If you are unsure about how to secure your app or are worried about storing user data (which is a real concern), you can request data from the user via PS, process it to provide your functionality, and then throw it away (discard it from memory).

For example, if you are providing a credit rating service, you might ask to see the user’s financial transaction history to create a credit score. Once you’ve calculated the user’s score, you no longer need the detailed financial data and would do well to discard it immediately.