From March 1, 2025, the V1 signature algorithm of Object Storage Service (OSS) is no longer available to new customers with new UIDs in phases. From September 1, 2025, OSS no longer updates and maintains the V1 signature algorithm, and the V1 signature algorithm is no longer available for new buckets in phases. We recommend that you use another signature algorithm at the earliest opportunity to prevent negative impacts on your business. For more information, see Guidelines for upgrading V1 signatures to V4 signatures.