CTF Writeups
2025
Pearl CTF 2025: Encryption Oracle
·816 words·4 mins
Cryptography
RSA
Leaks
Public modulus and public exponent recovery, factoring the public modulus from leak: d mod (p-1).
ARA CTF 6.0 2025 Finals: a2s 3c
·1279 words·7 mins
Cryptography
AES
Cryptanalysis
Differential Cryptanalysis to recover encryption key on reduced round AES.
Cyber Jawara National 2024: Class Select
·898 words·5 mins
Cryptography
AES
Mode-Abuse
Abusing the encryption of other AES modes to break AES OFB mode.