Hello,
1. Submission confirmed: This is the trackback page.
Trackback Page: This is the page that would show submission to users through some encrypted key. Each time a user submits, a secret encryption key is generated through mcrypt (and that is why it is a requirement) and optionally shared with him/her to view and/or edit their submission in future. In bare-bone, it looks something like this.
2. Browse submissions: This is User Portal Page.
Central Trackback page for Registered Users: Also known as the User Portal Page. This is where registered and logged in users can see all their past submissions and can even edit them if you permit.
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