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A Fast Bytecode VM for Arithmetic: The Compiler

In this post, we write the compiler for our AST to bytecode, and a decompiler for the bytecode. In this series of posts, we write a fast bytecode compiler and a virtual machine for arithmetic in Haskell. We explore the following topics: In this series of posts, we write a fast bytecode compiler and a virtual machine for arithmetic in Haskell. We explore the following topics: Parsing arithmetic expressions to Abstract Syntax Trees (ASTs). Unit testing for our parser. Interpreting ASTs. Comp

Hackers steal Microsoft logins using legitimate ADFS redirects

Hackers are using a novel technique that combines legitimate office.com links with Active Directory Federation Services (ADFS) to redirect users to a phishing page that steals Microsoft 365 logins. The method lets attackers bypass traditional URL-based detection and the multi-factor authentication process by leveraging a trusted domain on Microsoft's infrastructure for the initial redirect. Legitimacy of a trusted redirect Researchers at Push Security, a company that provides protection solut

Out-Fibbing CPython with the Plush Interpreter

Out-Fibbing CPython with the Plush Interpreter In the last post I talked about Plush, the toy programming language with actor-based parallelism I've been tinkering with. The implementation is still immature, but it's reached a point where I can write fun programs that produce 2D/3D graphics and parallelize things over multiple CPU cores. Something I'd like to try soon, for the fun of it, is to animate a spinning cube with software rendering (rasterization). Before I get to that though, I'd like

How to Scan Force Pushed Commits for Secrets

Key Insights The new Force Push Scanner tool scans for secrets in dangling commits on GitHub that remain exposed after certain force push operations. Run the following command to scan your GitHub repositories: python force_push_scanner . py -- db - file pushes . sqlite3 -- scan < github_org / user Zero-Commit Force Push operations: where developers attempt to erase mistakes by resetting their git history without pushing new commits. There are tens of millions of dangling commits publicly acc

Substack Sends Push Alert for Nazi Newsletter

Substack, the popular newsletter platform, recently sent out a push alert for a Nazi-themed newsletter. The publication in question, NatSocToday, describes itself as a “National Socialist weekly newsletter featuring opinions and news important to the National Socialist and White Nationalist Community.” The newsletter’s image header is a Nazi flag, and its latest post, as of Wednesday, was an article that includes the sentence: “We demand the return of all territory currently occupied by jews and

3 key takeaways from the Scattered Spider attacks on insurance firms

Scattered Spider continues to dominate the headlines, with the latest news linking the hackers to attacks on U.S. insurance giant Aflac, Philadelphia Insurance Companies, and Erie Insurance, disclosed through SEC Form 8-K filings which indicate the theft of sensitive customer data and operational disruption. This comes at the same time that Google Threat Intelligence Group shared that it “is now aware of multiple intrusions in the U.S. which bear the hallmarks of Scattered Spider activity”, spe

2025 Alonzo Church Award: Paul Blain Levy for Call-by-Push-Value (CBPV)

The 2025 Alonzo Church Award for Outstanding Contributions to Logic and Computation is presented to Paul Blain Levy for his fundamental study of effectful λ-calculi through the Call-by-Push-Value calculus. The awardee book and paper are: Paul Blain Levy. Call-By-Push-Value: A Functional/Imperative Synthesis. Semantics Structures in Computation 2, Springer 2004, ISBN 1-4020-1730-8 Paul Blain Levy. Call-by-Push-Value: Decomposing call-by-value and call-by-name. High.-Order Symb. Comput. 19(4): 3

Futureproof

AI tools are flooding the culture ecosystem — and no corner of the arts space is immune. In this series, we’re looking at the ways artists are embracing AI, pushing back on it, or trying their best to find an equilibrium with a new technology that’s both sweeping and destabilizing. We talk to perfumers questioning the looming automation of scent creation, fanfic writers pushing back on archive scrapers, and illustrators replacing the AI that once replaced them. The tech isn’t going away. Here’s