On Wednesday, the Federal Trade Commission (FTC) announced another contest to design a system to "identify unwanted robocalls received on landlines or mobile phones, and block and forward those calls to a honeypot." The agency will select "up to five contestants" as part of what it’s calling "Robocalls: Humanity Strikes Back."
The first qualifying phase launches Wednesday and runs through June 15, 2015 at 10:00pm Eastern Time, while the final phase concludes at DEF CON 23 on August 9, 2015.
Here's the FTC contest page. There's another similar contest (with no cash prize) being held "as part of the National Day of Civic Hacking." It appears they have done something similar in previous years as well.
(Score: 2) by kaszz on Friday March 06 2015, @08:23AM
There's a difference in SS7 numbers and the one presented as caller-identification to the customer.
One could perhaps use voice fingerprinting used in several successive calls as well.