Assorted links for Tuesday, October 22:

1. What’s new in System.Text.Json in .NET 9

   The 9.0 release of System.Text.Json includes many features, primarily with a focus on JSON schema and intelligent application support. It also includes highly requested enhancements such as nullable reference type support, customizing enum member names, out-of-order metadata deserialization and customizing serialization indentation.

2. A quick introduction to return address protection technologies
3. North Korean hackers use newly discovered Linux malware to raid ATMs

   The malware, tracked under the name FASTCash, is a remote access tool that gets installed on payment switches inside compromised networks that handle payment card transactions.

   The purpose of FASTCash is to compromise a key switch inside the complex networks that broker payment transactions among merchants and their banks on the one hand and, on the other, the payment card issuers who must approve a transaction… When a compromised card is used to make a fraudulent translation, FASTCash tampers with the messages the switch receives from issuers before relaying it back to the merchant bank. As a result, issuer messages denying the transaction are changed to approvals.

4. Building Knowledge Graphs at Production Scale for GenAI
5. Docker Best Practices: Using ARG and ENV in Your Dockerfiles

   If you need to access a variable during the build process but not at runtime, use ARG. If you need to access the variable both during the build and at runtime, or only at runtime, use ENV.