GPG Multi-Cloud is the method to encrypt, sign, and verify data across AWS, Azure, and Google Cloud without exposing private keys to any single provider. It takes the strength of GNU Privacy Guard and applies it across distributed infrastructure, so you can run workloads in parallel clouds and still enforce end-to-end encryption.
At the core, GPG uses public and private key pairs. In a multi-cloud environment, those keys must be managed with precision. Store private keys in secure vaults native to each cloud—AWS KMS, Azure Key Vault, GCP Cloud KMS—while keeping public keys accessible to all collaborators and systems. This decentralizes trust yet maintains strict cryptographic control.
When deploying GPG in a multi-cloud setup, the main focus is automated key distribution and revocation. CI/CD pipelines should fetch and use keys only within secure build steps. No plaintext keys in disk, logs, or environment variables. Use dedicated service accounts for signing and verifying operations.