Declan McCullagh reports:
The U.S. government has attempted to obtain the master encryption keys that Internet companies use to shield millions of users’ private Web communications from eavesdropping.
These demands for master encryption keys, which have not been disclosed previously, represent a technological escalation in the clandestine methods that the FBI and the National Security Agency employ when conducting electronic surveillance against Internet users.
Read more on CNET.
Thanks to Joe C. for this link.