Most security conversations start with the same question. Is is secure, today? For infrastructure expected to support assets, payments, identities, and applications for years, that is not enough. The better question is: Will the security model remain dependable as the environment changes? - Threat models evolve. - Cryptographic standards change. - New computing capabilities emerge. And infrastructure built today may still be processing transactions a decade from now. That makes resilience fundamentally different from security at a single point in time. A system can be secure under today's assumptions and still require substantial redesign when those assumptions change.