Amazon S3 now supports five additional checksum algorithms
Amazon Web Services has expanded Amazon S3's data integrity capabilities by adding support for five new checksum algorithms: MD5, XXHash3, XXHash64, XXHash128, and SHA-512. This brings the total number of supported checksum algorithms to ten, allowing organizations to verify data integrity end-to-end without requiring additional tooling or infrastructure. The new algorithms integrate seamlessly with existing S3 workflows, automatically validating checksums during upload and calculating composite checksums for multipart uploads. If no checksum is provided during upload, S3 automatically applies CRC64NVME as the default integrity protection. The feature extends to S3 Replication for cross-bucket data transfers and S3 Inventory for long-term checksum auditing. For organizations with existing data, AWS has enabled S3 Batch Operations to calculate checksums at scale for pre-existing objects without requiring data downloads or restoration. The enhanced checksum support is available immediately across 37 AWS regions at no additional cost, accessible through the AWS CLI and SDKs.
Why It Matters
This expansion addresses enterprise data integrity requirements by providing multiple industry-standard checksum options, giving organizations flexibility to align with their existing security protocols and compliance frameworks. The addition of widely-used algorithms like MD5 and SHA-512 enables seamless migration of data validation workflows to S3, while newer algorithms like XXHash variants offer improved performance for high-throughput scenarios.
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