There is that,... The original detectors of the signal should notify not just the scientists who put together the protocol, so that they can independently check it out. But also astronomers around the world, who then use every available telescope to study the source of the signal. If the signal is then confirmed to be that of alien communication, then the finding is spread to scientific channels along with the media.
Probably before that.
There will be no secrecy, and getting the word out quickly is important, as there would be an urgent need to have astronomers world-wide monitor any detected signal, 24 hours a day.
Here is more,... http://www.seti.org/faq
Edited by Hazzard, 12 February 2013 - 10:14 PM.