The friends at Xura sent over a compilation of security studies that are always a fun read. Fun like a roller coaster that occasionally has to be shut down for repairs and investigations. The study by Positive Technologies is a year old but the problem is a continual one for the industry.
Here is the primary issue in a nutshell. The SS7 was designed at a time when computers were rare and circuit routing needed to be set up dynamically on the network. In effect Signaling System Seven, was designed to reserve pathways on the public switched network. If you got a fast busy signal that mean you had blockage in the network. If you got a slow (regular) busy signal it meant the other person was on their phone already and you would have to ask for another path at another time.
Now on the Internet, reservations are pretty much nonexistent. You either have sufficient bandwidth between point A to point B or you experience delay. For data that is packet can live with delay and can we compiled when necessary. If its voice or video the packets have to maintain some sort of sequence although dropped packets can be masked to some extent. Regardless though packets don’t need reservations however you can deliberately route to specific routes for QoS (My friend Henry Sinnreich would say only because you are a bad ...Read More
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