Moving regulated data between AWS and GCP looks like a technical problem with a straightforward solution. The reality is more complicated. Before the first transfer runs, three distinct systems need to be configured correctly — each with its own failure modes, each with its own compliance implications.

Every cross-cloud data transfer is also an IAM event — on both sides. When the transfer completes, the data is in the right place. The credentials are often not revoked.

Chain-of-custody is a foundational concept in regulated industries: the ability to prove, at any point, what happened to a specific piece of data — who had access to it, when it moved, and whether it arrived intact. Inside a single cloud environment, this is straightforward. Across cloud boundaries, it is not.

Cloud logging has matured significantly. Every major CSP offers centralized telemetry, tamper-evident storage, and detailed access records. Inside a single cloud environment, audit readiness feels solved. But regulated data does not stay in one place — and the moment it crosses a cloud boundary, the picture changes completely.

Most teams moving regulated data between cloud environments check one box: encryption in transit. TLS is enabled. The transfer is encrypted. Done. But transport encryption and object-level protection are not the same thing — and the difference matters enormously for regulated industries.

A Technical Guide to TLS, IPsec, MACsec, and Object-Level Encryption for Cross-Cloud Data Transfers