{"id":"sigv4-scoped-to-service-region-date","text":"SigV4 signing keys are scoped to a specific service, region, and date — each signature is region-specific and cannot be reused across regions.","truth_value":"IN","source":"entries/2026/03/11/IAM-latest-UserGuide-reference_aws-signinghtml.md","source_url":"","source_hash":"389d739937adcf5d","justifications":[],"dependents":[],"metadata":{},"explanation":{"steps":[{"node":"sigv4-scoped-to-service-region-date","truth_value":"IN","reason":"premise"}]}}