"Further communications had best be by the secure channels we established," he said.

Can't brief you now, not even on a secure channel like this.

You need some sort of a secure channel to get the secret information.

I mean, and again, you'd need to give them the password over a secure channel.

There are no perfectly secure channels in the real world.

Or no one will trust me when I tell them they've got a secure channel.

"Control," he said over a secure channel on the radio.

He asked the judge to order the agency to provide secure channels for him to talk with the woman and her husband.

This is the normal operation condition of the secure channel.

I was going to say email, but you want to do it over a secure channel somehow.