class Rack::Protection::SessionHijacking

spoofed, too, this will not prevent all hijacking attempts.
from Firesheep. Since all headers taken into consideration might be
the session if those properties change. This essentially prevents attacks
Tracks request properties like the user agent in the session and empties
More infos
en.wikipedia.org/wiki/Session_hijacking<br>Supported browsers
all
Prevented attack

Session Hijacking
#

def accepts?(env) 

def accepts?(env)
  session = session env
  key     = options[:tracking_key]
  if session.include? key
    session[key].all? { |k,v| v == encrypt(env[k]) }
  else
    session[key] = {}
    options[:track].each { |k| session[key][k] = encrypt(env[k]) }
  end
end

def encrypt(value) 

def encrypt(value)
  options[:encrypt_tracking] ? super(value) : value.to_s
end