Hi all!

The Aggregation service team is currently exploring options for adtechs who may want to migrate from one cloud provider to another. This gives adtechs flexibility in using a cloud provider of their choice to optimize for cost or other business needs. Our proposed migration solution would enable adtechs to re-encrypt their reports from a source cloud provider (let’s call this Cloud A) to a destination cloud provider (let’s call this Cloud B) and enable them to use Cloud B to process reports originally encrypted for Cloud A as part of the migration. After migration is completed, use of Cloud A for processing reports will be disabled and the adtech will only be able to use Cloud B to process their reports.

In the short-term, this solution will support migration of aggregation service jobs from AWS to GCP and vice versa. As we support more cloud options in the future, this solution would be extensible to moving from any supported cloud provider to another.

Depiction of the re-encryption flow:

For any adtechs considering a migration, we encourage completing this migration before third-party cookie deprecation to take advantage of feature benefits such as:

• Apples to apples comparison using additional budget: We will allow adtechs to process the same report on both Cloud A and Cloud B during migration.
• Flexible migration windows: We will not enforce a timeline by which adtechs need to complete migration.

After third-party cookie deprecation, we plan to continue to support cloud migration with the re-encryption feature, but may not be able to give the additional benefits outlined above to preserve privacy.

We welcome any feedback on this proposal.

Thank you!