Here's an example of why it's still hard: you can use timing information to encode data. Pause for 5 seconds: signal your partner should not trump. Pause for

Here's an example of why it's still hard: you can use timing information to encode data. Pause for 5 seconds: signal your partner should not trump. Pause for 10 seconds: signal your partner should trump. It's almost the same as CPU timing attacks — there's always immense information leaking out if your sole focus is to capture what's going on behind the scenes.