Tom Zschach challenges the conventional wisdom that blockchain transparency is the ultimate goal. Instead, he advocates for "controlled opacity" through zero-knowledge proofs ZKPs and other privacy-preserving technologies. These tools allow for on-chain verification without exposing sensitive data. For developers, integrating ZKPs can enhance security and compliance in financial applications, making blockchain adoption more feasible for regulated sectors. This selective privacy approach builds trust by ensuring transparency only where necessary while maintaining confidentiality elsewhere. 