Unhosted privacy enhancements

gistfile1.txt

# Make keys unfindable

key:  sha1( salt + keyPath )
salt: sha1(rsaSign(userEmail, userPrivKey))
      or sha1(sessionKey) # Probably better, a subscriber would already have the session key

Example
-------

Publisher:  SET sha1("sekey" + "/blog"): aes("Hello World", "sekey")

Subscriber: SEND sha1("/subscribe"): msgEnc("SUB /blog")

Publisher:  RECEIVE sha1("/subscribe")
         -> SEND sha1("/published/blog"): msgEnc("PUB sekey")

Subscriber: RECEIVE sha1("/published/blog")
         -> "sekey"

Subscriber: GET sha1("sekey" + "/blog")
         -> "Hello World"