Only through rites of extreme secrecy did the scientists remain safe.

I fully realise the need for extreme secrecy in this type of operation.

In both cases the speakers emphasized extreme secrecy of the matter.

Due to the extreme secrecy surrounding the agency, there is little concrete information available about it or its activities.

The mission was carried out in extreme secrecy and with strict security.

The session with Bhutto was held at midnight and remained under extreme secrecy.

But the extreme secrecy around the project had excluded him from that part of the process.

There are serious issues yet to be resolved, but that's to be expected in an atmosphere of extreme secrecy.

It is also possible that these crimes were committed in extreme secrecy.

But the company's extreme secrecy means that nobody is sure quite how popular the device really is.