This document discusses privacy, trust, and biometrics. It makes three main points: 1. Trust in technologies and government is fragile and built over the long term through transparency and respecting human rights, not just communication. 2. Many security technologies proposed after 9/11 lacked credible impact assessments and had unclear costs and benefits compared to alternatives. This undermines trust. 3. For any new biometric technology to be trusted, strong evidence of its effectiveness is needed, as well as careful analysis of its privacy and human rights impacts and oversight of its implementation and use. Without these precautions, trust will be eroded.