idea: integrate captcha into some furls

[samuelstoller]

Often when I share data with other people on the internet I do the following:

• Put the data in a directory on my web server.
• Add some .htaccess fu to my webserver to get basic auth protection of the data
• Mail the people a link to the data, I also put on a line following the URL the username and password necessary to access the data.

This way if a search engine grabs the link, the data won't be accessible to the whole internet. (A human needs to read the email message and locate the http auth data necessary to follow the link.)

Furls could emulate this captcha like behavior:

• have an 'incomplete' furl type; missing some critical bytes, but complete enough that the client can figure out whats going on to prompt the user for a key.
• the furl would be completed with a 'key' which a user can pass out-of-link.

[zooko]

Just fixing the wikiformatting thing.