R4Y4N3 — AI red teamer and security researcher in Algeria. Adversarial testing of LLM applications, AI agents, RAG, MCP, and tool trust boundaries.https://r4y4n3-portfolio.pages.dev/https://r4y4n3-portfolio.pages.dev/blog/sekai-ctf-2026/https://r4y4n3-portfolio.pages.dev/blog/sekai-ctf-2026/Complete writeups for every SEKAI CTF 2026 blockchain challenge: analysis, vulnerable code, exploits, root causes, and fixes.Sun, 28 Jun 2026 00:00:00 GMThttps://r4y4n3-portfolio.pages.dev/blog/nextrace-ctf/https://r4y4n3-portfolio.pages.dev/blog/nextrace-ctf/The design and solutions behind four Web3 challenges covering key management, chain analysis, IPFS, and hidden contract functions.Thu, 06 Nov 2025 00:00:00 GMT