# Encryption in Amazon Simple Workflow Service
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## Encryption at rest
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Amazon SWF always encrypts your data at rest. Data in Amazon Simple Workflow Service is encrypted at rest using transparent server-side encryption. This helps reduce the operational burden and complexity involved in protecting sensitive data. With encryption at rest, you can build security-sensitive applications that meet encryption compliance and regulatory requirements

## Encryption in transit
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All data that passes between Amazon SWF and other services is encrypted using Transport Layer Security (TLS).