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Message Data Protection is a feature in Amazon SNS used to define your own rules and policies to audit and control the content for data in motion, as opposed to data at rest.
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Message Data Protection provides governance, compliance, and auditing services for enterprise applications that are message-centric, so data ingress and egress can be controlled by the Amazon SNS topic owner, and content flows can be tracked and logged.
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You can write payload-based governance rules to stop unauthorized payload content from entering your message streams.
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You can grant different content-access permissions to individual subscribers, and audit the entire content-flow process.
