Client Key – A secret key associated with each client account. You will have different keys for your Dev and Live environments. This key should NEVER be exposed or used on client facing portions of your application.

Remote ID – This is a string that is used to identify your users.  It should be unique for each user.  Secure Store is agnostic to what this key contains. You will probably want to use your unique ID that you have assigned to your users in your system.

Nonce – This is a short-lived one time key that is generated as needed to reference a specific Remote ID under your account.  This will be what is used for validation on the client facing portions of your application.