“This is theoretically possible but practically unlikely,” said Claire Cranton, an association spokeswoman. She said no one else had broken the code since its adoption. “What he is doing would be illegal in Britain and the United States. To do this while supposedly being concerned about privacy is beyond me.” Some security experts disagreed. While the disclosure does not by itself threaten the security of voice data, one analyst said companies and governmental organizations should take the same steps to ensure the security of their wireless conversations as they do with antivirus software for computer files.

If he was able to compromise the whole scheme (and it looks like he was) then he is correct that it is long-since time to abandon that particular scheme. It's never good enough to be 'a little bit' ahead ...