FTC challenge: Zap Rachel the robocaller

Zapping Rachel

The Federal Trade Commission is calling on hackers to help zap an annoying robocaller.

Calls from "Rachel from Cardholder Services" have irritated millions of Americans.

The FTC is asking hackers at next month's DEF CON 22 hacking conference in Las Vegas to build a next-generation robocall "honeypot" -- an information system trap to lure and identify people behind illegal robocalls.

The agency is sponsoring a contest called Zapping Rachel with cash prizes.