An architect from a previous project implemented Platform Shield Encryption for a company.

The architect must extend the Shield Platform Encryption policy to include the additional supported Account fields and also address the data that already exists. Enabling encryption for a field establishes the policy for the field, but historical values that were stored before the change must be brought into the encrypted state through the platform ' s data synchronization or re-encryption process. That is why simply waiting for an activation notification is not sufficient to guarantee that every existing value has been encrypted. Classic Encryption is also not a substitute for the Shield Platform Encryption architecture that the organization already uses. The secure implementation treats encryption as a lifecycle concern: select supported fields, activate the policy, ensure key material and tenant-secret management are correct, synchronize existing data, and validate the resulting encryption state. This preserves a consistent enterprise encryption model instead of mixing encryption technologies. Study Guide reference: Access to Other Data - Shield Platform Encryption, encryption policies, key management, existing-data synchronization, field encryption, and data-at-rest protection.