@blackb6a helped preparing some challenges for MOCSCTF, a 8.5-hour long CTF in Macau. This time I wrote nine challenges and @hoifanrd made one of them (3-AES). This blog post covers the intended solution for all of them. These are the summary of the challenges: Challenge Name Category Solves RSA Trio Crypto 2/43 Slightly Informative Crypto 2/43 NP-SHA256 Crypto 1/43 HMAC-SHA256 Crypto 2/43 RC4 Crypto 0/43 HashTable Misc 3/43 Wordle Crypto, Misc 0/43 3-AES Crypto, Misc 0/43 Elementary Reverse ...