Whoever deliberately attempts to insure confidentiality with another person is usually in doubt as to whether he inspires that person's confidence in him. One who is sure that he inspires confidence attaches little importance to confidentiality.
I have known a vast quantity of nonsense talked about bad men not looking you in the face. Don't trust that conventional idea. Dishonesty will stare honesty out of countenance any day in the week, if there is anything to be got by it.
When young we have a vivid sense of basic values like trust and warm-heartedness, which we tend to neglect in today's competitive world as we grow up, yet from birth we all have a need for affection. The emotions we experience today have not changed much over the last few thousand years, but the interest increasing numbers of people are showing in their inner world and how their emotions work is a sign of maturity.
If the security forces continue to be dominated as they are now by political groups or sects, then the people won't trust in them - and the result will be civil war or fragmentation of the country.
National security laws must protect national security. But they must also protect the public trust and preserve the ability of an informed electorate to hold its government to account.