writeup
2025 Cyber Apocalypse: Crypto Traces
Exploit AES-CTR mode vulnerability in a custom IRC-like server with reused counter initialization
#htb
#ctf
#cryptography
+3 writeup
2024 Cyber Apocalypse: Blunt
Exploit weak Diffie-Hellman with small parameters to recover shared secret and decrypt AES-CBC ciphertext
#htb
#ctf
#crypto
+3 writeup
HTB Hack The Boo Practice: SPG
Reverse engineer a password generator to decrypt an encrypted flag
#htb
#ctf
#crypto
+3 writeup
2023 Business CTF: Initialization
Break AES-CTR encryption with nonce reuse vulnerability
#htb
#ctf
#crypto
+3 writeup
2023 Cyber Apocalypse: Multipage Recyclings
Exploit custom AES ECB implementation with block recycling vulnerability
#htb
#ctf
#crypto
+3 writeup
2023 Cyber Apocalypse: Perfect Synchronization
Exploit AES ECB mode encryption with known plaintext and partial key recovery
#htb
#ctf
#crypto
+3 writeup
2022 Hack The Boo: Whole Lotta Candy
AES encryption challenge with multiple block cipher modes - exploit ECB mode weakness
#htb
#ctf
#crypto
+4