Loading encrypted data files from Amazon S3
You can use the COPY command to load data files that were uploaded to Amazon S3 using server-side encryption, client-side encryption, or both.
The COPY command supports the following types of Amazon S3 encryption:
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Server-side encryption with Amazon S3-managed keys (SSE-S3)
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Server-side encryption with Amazon KMS keys (SSE-KMS)
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Client-side encryption using a client-side symmetric root key
The COPY command doesn't support the following types of Amazon S3 encryption:
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Server-side encryption with customer-provided keys (SSE-C)
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Client-side encryption using an Amazon KMS key
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Client-side encryption using a customer-provided asymmetric root key
For more information about Amazon S3 encryption, see Protecting Data Using Server-Side Encryption and Protecting Data Using Client-Side Encryption in the Amazon Simple Storage Service User Guide.
The UNLOAD command automatically encrypts files using SSE-S3. You can also unload using SSE-KMS or client-side encryption with a customer managed symmetric key. For more information, see Unloading encrypted data files
The COPY command automatically recognizes and loads files encrypted using SSE-S3 and SSE-KMS. You can load files encrypted using a client-side symmetric root key by specifying the ENCRYPTED option and providing the key value. For more information, see Uploading encrypted data to Amazon S3.
To load client-side encrypted data files, provide the root key value using the MASTER_SYMMETRIC_KEY parameter and include the ENCRYPTED option.
copy customer from 's3://mybucket/encrypted/customer' iam_role 'arn:aws:iam::0123456789012:role/MyRedshiftRole' master_symmetric_key '<root_key>' encrypted delimiter '|';
To load encrypted data files that are gzip, lzop, or bzip2 compressed, include the GZIP, LZOP, or BZIP2 option along with the root key value and the ENCRYPTED option.
copy customer from 's3://mybucket/encrypted/customer' iam_role 'arn:aws:iam::0123456789012:role/MyRedshiftRole' master_symmetric_key '<root_key>' encrypted delimiter '|' gzip;