Thieves stole the master key to RSA’s pseudo-random number generator and can manufacture phony ones to break into corporate networks, expert says. If it turns out SecurID has in fact been compromised, businesses need to have a fallback plan for what they will do, he says. “You have to ask yourself if you are a big enough shop that you could be a target,” John Pironti, president of IP Architects, a security consulting firm. He says stealing core security technology is a prime target of attackers because that can undermine security of vast amounts of data and transactions.”]