Cryptographic Agility and Algorithm Migration Questions

Principles and practices for building systems that can migrate between cryptographic algorithms and parameters with minimal disruption. Interviewers will probe versioning and negotiation strategies, hybrid and dual deployment designs for gradual migration, key rotation and revocation procedures, compatibility and rollback handling, testing and validation plans, and how to make migration decisions that align with standards and threat timelines. The topic also covers governance around deprecation, rollout strategies including staged deployments and canarying, and how to measure and mitigate operational risk during algorithm transitions.