| Python | Debian | pwn |
| Linux kernel | Rust, Nim and Go | Bug Bounty |
| Docker | Identifying a security problem in RFC | Rust |
| Maldev, ASM and in memory execution | RCE on a Web server or exploiting web-client/browser vulnerability | OSINT and CTI |
| Web | Malware reverse engineering | Web design |
| Privilege escalation (Linux or Active Directory) | Incident response and forensic | Hardware hacking |
| Open source and cross platform tools without any supply chain | RFC and protocols: HTTP, SMTP, ARP, TCP, UDP, DNS (and derived: LLMNR and mMDS) and URL | English |