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Cutting Through the Security Noise: How XDR helps Teams Focus on Real Threats

Extended Detection and Response (XDR) is a modern security technology designed primarily as a Security Operations Centre (SOC) enabler tool. It addresses the complexities and challenges faced by security teams in today’s evolving threat landscape. The core idea behind XDR is to take challenging incident response processes and make security analysts more effective, even at more junior levels. The term XDR itself has emerged over the last few years and can be seen as somewhat nebulous, with diffe

Go Assembly Mutation Testing

While maintaining and developing the Go cryptography standard library, we often spend significantly more time on testing than on implementation. That’s good and an important part of how we achieve our excellent security track record. Ideally, this would be especially true for the least safe parts of the library. However, testing assembly cores presents unique challenges, due to their constant-time nature. This has been a long-standing issue. For Go 1.26, I am working on introducing a mutation

Verified dynamic programming with Σ-types in Lean

1. Introduction If you’ve taken an algorithms class, you have likely seen dynamic programming, specifically a technique called memoization. Memoization works to optimize recursive algorithms by caching the solutions to subproblems in a table, and when a subproblem is encountered, it queries the table instead of recomputing the solution. This gives us an exponential performance boost. This blog post will show how to solve a dynamic programming problem using memoization in Lean, and verify its c

Verified Dynamic Programming with Σ-types in Lean

1. Introduction If you’ve taken an algorithms class, you have likely seen dynamic programming, specifically a technique called memoization. Memoization works to optimize recursive algorithms by caching the solutions to subproblems in a table, and when a subproblem is encountered, it queries the table instead of recomputing the solution. This gives us an exponential performance boost. This blog post will show how to solve a dynamic programming problem using memoization in Lean, and verify its c