Here's a summary of what's new for .NET container images in this Preview 3 release:
All .NET container images now are now cryptographically signed by Microsoft according to the Notary Project specification. See the image signatures documentation for the latest documentation on inspecting and verifying image signatures.
Use the Notation CLI or the ORAS CLI to see details about signature artifacts:
notation inspect mcr.microsoft.com/dotnet/sdk:11.0.100-preview.3
oras discover mcr.microsoft.com/dotnet/sdk:11.0.100-preview.3