Engineering
Plan an application migration increment
What you will understand
Choose a narrow change with explicit dependencies, data formats, and acceptance criteria.
Last reviewed:
Understand the context
Application migration should begin with a reviewed cryptographic use case, not an automatic replacement of every RSA or elliptic-curve reference. Identify the business workflow and the supported provider path. Separate transport security from application-level signing, token verification, data encryption, and key wrapping.
Plan the work
Choose one candidate boundary. Define the current behavior, target mechanism, exact implementation, peer compatibility, and data-format implications. Plan how old keys and historical records remain readable or verifiable. A change to a signing key or serialized signature format can affect consumers that are not deployed with the application.
Evidence to review
Build the smallest isolated prototype that answers the compatibility question. Use established implementations and published APIs, and keep production credentials out of the lab. Test valid operations, invalid signatures or ciphertexts, missing provider support, rotation, and recovery. Document measurements in the actual environment rather than transferring benchmark claims from another product.
Limits and next steps
A working prototype is evidence about the tested configuration only. Production deployment needs separate authorization, operational ownership, change controls, and rollback planning. Do not introduce custom cryptographic primitives or an undocumented combiner to work around unavailable protocol support. If the provider is not ready, record the blocker and retain a reviewable migration backlog.
Evidence and limitations
Educational guidance with referenced standards; no customer system has been assessed for this article. Implementation and protocol support must be verified for the selected environment.