Technical security audits and offensive security for AI, Web3 and Web2: AI red teaming, smart-contract & DeFi audits, application & API penetration testing, cloud security, and identity/secrets advisory.https://dseclabs.xyzen-ushttps://dseclabs.xyz/blog/build-your-own-gandalfhttps://dseclabs.xyz/blog/build-your-own-gandalfSkip reading about how Gandalf-style guardrails work and build one yourself. A free, offline Python lab using Ollama that implements all eight defense patterns from this series, ready for you to attack.Wed, 15 Jul 2026 00:00:00 GMTprompt-injectiongandalfllmaired-teaminghttps://dseclabs.xyz/blog/beating-gandalf-level-7-and-the-whitehttps://dseclabs.xyz/blog/beating-gandalf-level-7-and-the-whiteThe final Gandalf levels stack every defense and then harden them with data from a million real attacks. They're beatable too, and that's the most important lesson in the whole series.Fri, 10 Jul 2026 00:00:00 GMTprompt-injectiongandalfllmred-teamingaihttps://dseclabs.xyz/blog/beating-gandalf-levels-4-6https://dseclabs.xyz/blog/beating-gandalf-levels-4-6Levels 4–6 replace dumb string filters with LLM-as-judge guards on the input and output. Smarter, harder, and still beatable with indirection. Here's how, and what the actual guard code looks like.Mon, 06 Jul 2026 00:00:00 GMTprompt-injectiongandalfllmjailbreakaihttps://dseclabs.xyz/blog/beating-gandalf-levels-1-3https://dseclabs.xyz/blog/beating-gandalf-levels-1-3The first three Gandalf levels take you from "just ask" to defeating a deterministic output filter with encoding. A hands-on tour of the weakest LLM guardrails and why they fold.Fri, 03 Jul 2026 00:00:00 GMTprompt-injectiongandalfllmjailbreakaihttps://dseclabs.xyz/blog/prompt-injection-explained-with-gandalfhttps://dseclabs.xyz/blog/prompt-injection-explained-with-gandalfLakera's Gandalf is the best on-ramp to prompt injection ever built. Here's the full defense taxonomy behind its levels, and why none of it is enough on its own.Wed, 01 Jul 2026 00:00:00 GMTaillmprompt-injectiongandalflakerared-teaming