Backblaze B2 Adds Default Encryption for New Uploads

This post announces the enforcement of SSE-B2 as the default for all new uploads and destination copies in Backblaze B2 Cloud Storage, starting September 14, 2026. This change is automatic, requires no application modifications, and has no additional cost or performance impact. Existing objects retain their prior encryption state. SSE-C remains available for users who need to provide their own keys. The post provides examples of how this default applies to S3-Compatible API and B2 Native API usage, highlighting that explicit encryption flags are no longer necessary for new data.