Allow people to create and share secrets

[jessykate]

Authenticated accounts should create a public/private key pair for that user. Users nearby one another can become friends by signing each others' keys (using a pad of course). Individuals can then create pads and deposit encrypted notes/secrets for their "friends." (All needs to happen in a simple UI/user-friendly way of course).

You could allow push notifications for notes left by people you trust.

Thinking about the scavenger hunt ideas, could you somehow use presence at a specific pad to endorse/sign a user's key (automatically in the background) which would then grant them access to another pad? (Since location information is easy to fake, this might be an overly secure feature for something inherently insecure to begin with...)