Writeup for the ASIS Primes RSA challenge from CryptoCTF 2025: abusing attacker-chosen primes and a faulty public exponent (e ^ 1) to decrypt the flag.
Writeup for Phoney from CryptoCTF 2025: breaking a multi-prime RSA scheme using a leaked relation between the secret primes.
Writeup for Mancity from CryptoCTF 2025: factoring a 256-bit RSA modulus whose primes come from a custom bit-pattern generator.
Writeup for Vinad from CryptoCTF 2025: factoring an RSA modulus whose prime is generated from a binary parity (Hamming weight) function.
