What “store now, decrypt later” means for an archive owner
An encrypted archive can remain valuable long after the system that created it has disappeared. The data may be intact while the credentials are incomplete, the implementation is obsolete or the cost of attempting recovery is commercially unreasonable.
Preservation comes before decryption
A future recovery effort cannot succeed if the source media has degraded, the original layout has been lost or previous attempts have modified the evidence. The first task is therefore to preserve the material: inventory the media, record its condition, create verified images where appropriate and maintain redundant offline copies.
“Later” depends on the case
There is no universal date when an encrypted archive becomes recoverable. Feasibility depends on the algorithm, key derivation, implementation, password characteristics, available key material, known plaintext, archive size and the cost of suitable compute.
Recovery must remain controlled
If technology makes recovery practical, it may also increase the risk of unauthorized access. That is why the preserved archive should remain offline, access controlled and tied to a documented release process. Better hardware should improve the owner’s recovery options without making the archive public.