Contacting Alien Civilisations
First, you have to detect the signal. This is more difficult than you might think:
~ Roedy (1948-02-04 age:69)
- The more advanced the modem, compaction and encryption technology, the more a signal sounds like random noise.
- Aliens would not broadcast radio signals. It pollutes the ether for hundreds of light years. Aliens would use point-to-point laser. You cannot intercept that without being on the narrow beam.