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Niels Tanis

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Building Community-Driven Security Analysis for Your .NET Software Supply ChainNDC Manchester 20252025-12-01
Explains concrete tools and results: an open-source CLI called Fennec Labs that runs OSS Scorecards on solution dependencies, flags transitive CVEs (now…
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Using GenAI on and inside your code, what could possibly go wrong?NDC Copenhagen 20252025-09-08
Academic benchmarks find roughly 40% of generated apps contain vulnerabilities; a Veracode-style dataset shows ~71% of orgs carry year‑old security debt and…
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Using GenAI on and inside your code, what could possibly go wrong?NDC Oslo 20252025-05-19
Academic studies find concrete failure rates: a 2021 Copilot analysis of ~1,700 generated apps shows 41% vulnerable and a later study of ~400 apps finds 36%…
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Using GenAI on your code, what could possibly go wrong?NDC Security 20252025-01-20
Academic benchmarks find roughly 40% of generated snippets contain vulnerabilities (2021–2023 studies) and code velocity rises as developers accept LLM output…
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Reviewing NuGet Packages security easily using OpenSSF ScorecardCPH DevFest 20242024-08-26
About 80% of an app is third‑party code and Scorecard gives a fast, evidence‑based lens: OpenSSF Scorecard runs ~30 checks (vulns, branch protection, CI…
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Assessing 3rd Party Libraries More Easily With Security ScorecardsGlobal AppSec Lisbon 20242024-06-24
Claim: automated security scorecards let teams quantify library risk quickly. Uses OpenSSF Scorecard checks, the scorecard CLI and public viewers plus…
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Reviewing NuGet Packages security easily using OpenSSF ScorecardNDC Oslo 20242024-06-10
OpenSSF Scorecard runs automated checks and produces a 0–10 aggregate score with weighted risks; OpenSSF Scorecard gives 0–10 aggregate score. The demo shows…
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Assessing NuGet Packages more easily with Security ScorecardsNDC Security 20242024-01-09
OpenSSF Scorecards runs automated checks and rates projects 0–10 so maintainability and build risks become measurable; the CLI and dev.dev API already embed…
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Using WebAssembly to run, extend, and secure your .NET applicationNDC Porto 20232023-10-16
Demonstrates compiling a .NET CLR into a single ~8.5 MB .wasm bundle and running it outside the browser using WASI + Wasmtime host, loading a Rust-compiled…
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Using WebAssembly to run, extend, and secure your .NET applicationNDC Security 20232023-01-16
Shows how .NET runs inside browser and servers by compiling runtimes to WASM and using WASI: Blazor downloads DLLs and a .NET WASM CLR, server-side uses…
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Securing your .NET application software supply-chainNDC Sydney 20222022-10-12
Explains concrete defenses: shows SolarWinds and CodeCov as real failures, demonstrates making .NET builds deterministic (difference came from PDB paths, fixed…
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Sandboxing .NET assemblies for fun, profit and of course security!NDC Porto 20222022-04-25
Shows a concrete method to limit a NuGet library without changing its source by loading it into a separate folder via AssemblyLoadContext, publishing it…
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Securing your .NET application software supply chainNDC Oslo 20212021-11-29
Shows concrete fixes: a binary diff demo finds non-reproducible DLLs caused by PDB paths and resolves them by embedding symbols and using dotnet-reproducible /…
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The Rise of Software Supply-Chain Attacks – How Secure is your .NET Application?NDC London 20212021-01-25
A .NET application supply chain walkthrough shows where attacks actually occur: compromised IDEs and extensions, CI/CD build scripts (a VS Code build variable…
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The Rise of Software Supply-Chain Attacks – How Secure is your .NET Application?NDC Sydney 20202020-08-31
Shows concrete supply‑chain failures (npm event-stream, XcodeGhost, Twilio SDK, stolen git credentials and a 500 GB Microsoft leak) and demonstrates tools that…
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Reducing Third-Party Security Risk in .NET Core ApplicationsNDC Oslo 20202020-06-08
Shows a demo MVC app where an included PDF component allows path traversal and server‑side request forgery (loads remote images). Uses .NET Core 3.1…
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Reducing Third-Party Security Risk in .NET Core ApplicationsNDC London 20202020-01-27
Scans a real .NET Core app and finds a widely used PDF library that pulls images by URL, exposing server‑side request and file disclosure risks; shows a live…
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Reducing Third-Party Security Risk in .NET Core ApplicationsUpdate Conference Prague 20192019-11-14
Demo MVC app has two concrete bugs: dynamic filename creation allowing path traversal and image URLs causing server‑side request forgery by fetching remote…
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Building Secure ASP.NET Core MVC ApplicationsAppSec USA 20172017-09-19
Shows that ASP.NET Core MVC defaults reduce common mistakes but require explicit fixes: controllers are convention‑discovered, model binding enables…
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