Use Signature Version 4 signing - Amazon Elastic Compute Cloud
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Use Signature Version 4 signing

Signature Version 4 is the process to add authentication information to Amazon requests sent by HTTP. For security, most requests to Amazon must be signed with an access key, which consists of an access key ID and secret access key. These two keys are commonly referred to as your security credentials. For information about how to obtain credentials for your account, see Understanding and getting your credentials.

If you intend to manually create HTTP requests, you must learn how to sign them. When you use the Amazon Command Line Interface (Amazon CLI) or one of the Amazon SDKs to make requests to Amazon, these tools automatically sign the requests for you with the access key that you specify when you configure the tools. When you use these tools, you don't need to learn how to sign requests yourself.

For more information, see Signing Amazon requests with Signature Version 4 in the Amazon General Reference.