Kubernetes Secrets Use Base64 Encoding, Not Encryption, Experts Warn

A technical explainer published on DEV Community highlights a widespread misconception among Kubernetes users: Secret objects store data as Base64-encoded text, not encrypted values. Base64 is a binary-to-text encoding scheme that is instantly reversible without any key, meaning credentials stored this way remain effectively in plaintext. Without additional configuration, Kubernetes Secrets sit in the etcd datastore with no cryptographic protection. Developers are advised to treat any Secret YAML file as plain credentials and avoid committing it to version control. Real security requires layered measures such as etcd encryption at rest via a KMS provider, Sealed Secrets, SOPS, or external secret stores like HashiCorp Vault, combined with strict RBAC controls.