
During October 2025, Daniel Thomson enhanced security policy granularity in the aws/aws-lambda-dotnet repository by introducing NotResource support to the APIGatewayCustomAuthorizerPolicy. He implemented this feature using C# within the AWS Lambda .NET runtime, focusing on backend development and IAM policy management. The addition of the NotResource field allows developers to explicitly exclude resources from custom authorizer IAM policies, addressing the risk of over-permissive access and aligning with best practices for security and compliance. Daniel’s work provided more precise access control for API Gateway custom authorizers, demonstrating a thoughtful approach to policy management and a solid understanding of AWS technologies.
October 2025 — Focused on enhancing security policy granularity in AWS Lambda .NET (aws/aws-lambda-dotnet). Key feature delivered: NotResource support in APIGatewayCustomAuthorizerPolicy, enabling users to explicitly exclude resources from custom authorizer IAM policies. This improves security posture and policy precision for serverless applications leveraging API Gateway custom authorizers. The change was implemented in aws/aws-lambda-dotnet with commit d96674016ff1ac7c51823c3a9a595fdaaebe1e7f (#2165). Overall impact: tighter access control, reduced risk of over-permissive policies, and better alignment with IAM best practices. Technologies: AWS API Gateway, IAM policies, APIGatewayCustomAuthorizerPolicy, AWS Lambda .NET runtime, Git commits.
October 2025 — Focused on enhancing security policy granularity in AWS Lambda .NET (aws/aws-lambda-dotnet). Key feature delivered: NotResource support in APIGatewayCustomAuthorizerPolicy, enabling users to explicitly exclude resources from custom authorizer IAM policies. This improves security posture and policy precision for serverless applications leveraging API Gateway custom authorizers. The change was implemented in aws/aws-lambda-dotnet with commit d96674016ff1ac7c51823c3a9a595fdaaebe1e7f (#2165). Overall impact: tighter access control, reduced risk of over-permissive policies, and better alignment with IAM best practices. Technologies: AWS API Gateway, IAM policies, APIGatewayCustomAuthorizerPolicy, AWS Lambda .NET runtime, Git commits.

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