Topic
Security
2 tutorials tagged Security.
AWS & Serverless
How AWS credentials work: access keys, Signature V4 and the Lambda execution role
How does a request prove who sent it to AWS? Access keys, secret keys, request signing (Signature V4), why Lambda needs no keys in code, and a hands-on test of an IAM-protected function URL with Postman.
12 Nov 2026 · AWS · IAM · Lambda
AWS & Serverless
Securing an Amazon OpenSearch domain: access policy, fine-grained access control and signed requests
The three security layers of an OpenSearch domain on AWS, why you should not leave a domain open, how to restrict it with a domain access policy in CDK, and how to call it from Postman with an IAM user.
12 Nov 2026 · AWS · OpenSearch · IAM
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