USpace uses your email address for account creation and for positive identification of your identity by your Trusted Connections.
When you sign up, your email becomes your unique USpace User ID across the entire Unpublished Space (USpace) platform.
Your USpace email ID cannot be changed.
Like everything else on your profile, your USpace email ID is visible only to your Trusted Connections.
This unchanging identification is how all connections are created across the USpace platform.
Your actual knowledge that the person you are connecting with uses their USpace email in real life is what makes that connection secure.
Likewise, the email address that you use to create your USpace account indicates to your real life colleagues, family and friends that the person they are connecting with on USpace is actually you and no one else.