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Web application security challenges including XSS, SQL injection, authentication bypasses, and server-side vulnerabilities.

Event retrospectives and comprehensive overviews linking to individual challenge writeups and analysis.

Binary analysis, malware reversing, code obfuscation, and assembly language challenges.

Cryptographic challenges covering classical ciphers, modern encryption, hash functions, and cryptanalysis techniques.

JSON Web Token security challenges involving token manipulation, signature bypasses, and authentication flaws.

Digital forensics including memory dumps, network traffic analysis, file carving, and steganography.

Network security challenges covering protocols, packet analysis, and infrastructure vulnerabilities.

Miscellaneous challenges including programming, logic puzzles, and unconventional problem types.

Penetration testing scenarios covering reconnaissance, exploitation, and post-exploitation techniques.