Skip to content
AITroveRead. Build. Understand.
Reading list
Make this comfortable

Locked objects: test retention, legal hold, and decryption together

Last updated: 5 Oct 20266 min read
tutorial
AdvancedBy AITrove Editorial

An object-level retention rule can block permanent deletion of a protected version for a fixed period, while a legal hold can continue until an authorized actor removes it. In a versioned store, a simple delete may still add a marker that hides a protected version from normal reads. Encryption adds a separate dependency: the restore identity must be able to use the required key when the object is needed. An immutable ciphertext with an unavailable key is not an accepted backup.

Operational decision

A regulated payout ledger keeps signed daily exports. Separate ordinary writers, retention administrators, legal-hold administrators, and restore readers. In a disposable account, protect one version, attempt a permanent version delete with the ordinary role, and record the denied result. Then issue a simple delete and verify whether a marker hides the old version while the protected bytes remain. Turn on a legal hold, let the planned retention window end in the test design, and verify that hold removal is a separate reviewed action. Restore the exact version using the recovery role and encryption key; test one older backup after a key rotation and verify its digest against the ledger manifest. Record the retention mode and authority able to change it. Check that the key’s deletion schedule, grants, and account boundaries outlive every required restore point. Never use a real legal hold merely to exercise the tutorial, and never infer compliance from a successful write alone.

Output
Payout export recovery gate
Protected version: identifier and retain-until time recorded
Simple delete: marker behavior tested separately
Permanent delete: ordinary role denied during protection
Legal hold: distinct owner and removal workflow
Decrypt: old and current exports readable by recovery role
Integrity: restored digest matches signed ledger manifest

Cost and verification

Retention increases stored-version bytes and can prevent cost-driven cleanup until expiry. Restore testing adds read and key-service requests; reviewing K versions requires O(K) metadata work and selected data reads. Measure protected-version count, key-access denial, tested restore age, and time from incident start to a verified readable export. The strongest deletion barrier is useless if the recovery role cannot decrypt or locate the chosen version.

Common Mistakes

  • Do not treat a delete marker as proof a locked version was erased.
  • Do not assume legal hold ends when a fixed retention date passes.
  • Do not retire an encryption key before the last protected object can be restored.

Connected lessons

Practice and check

Cloud authority follow-up

devops
object-storage
Storage details