No prize involved... just the admiration of me and my readers if you're the first to guess which movie this quote is from:

No more secrets, Marty

It's from another of my all-time favorites.  No Googling please.  Let's keep it honest.

Update:  OK... nobody has officially guessed it yet.  If this one doesn't give it away, then nothing will:

Hi.  My name is Werner Brandis.  My voice is my passport.  Verify me.

Update II:  Congrats to Sliver, who guessed correctly.  The movie is Sneakers... a classic from 1992 which had a great ensemble cast of incredible actors including Robert Redford, Ben Kingsley, Sidney Poitier and James Earl Jones.

Dick Gordon:  National Security Agency.
Martin Bishop:  Ah. You're the guys I hear breathing on the other end of my phone.
Dick Gordon:  No, that's the FBI. We're not chartered for domestic surveillance.
Martin Bishop:  Oh, I see. You just overthrow governments. Set up friendly dictators.
Dick Gordon:  No, that's the CIA. We protect our government's communications, we try to break the other fella's codes. We're the good guys, Marty.
Martin Bishop:  Gee, I can't tell you what a relief that is, Dick.