writeup
Alpaca CTF 2026: reused-n
Exploit a Common Modulus Attack on RSA with gcd(e1,e2)=2 and recover the flag via integer square root when m² < n
#ctf
#cryptography
#rsa
+3 writeup
2024 Cyber Apocalypse: Primary Knowledge
Exploit RSA implementation using prime modulus instead of semiprime
#htb
#ctf
#crypto
+2 writeup
2023 Business CTF: Interception
Exploit weak PRNG in RSA system to decrypt enemy communications
#htb
#ctf
#crypto
+3 writeup
2023 Cyber Apocalypse: Small sTeps
Exploit RSA with small public exponent e=3 using Coppersmith's attack
#htb
#ctf
#crypto
+3