Subjects

all algo bash crypto forensics misc pwn rev web

Competitions

AmateursCTF-2023 AngstromCTF-2022 AngstromCTF-2023 BuckeyeCTF-2023 HSCTF-2022 HSCTF-2023 ImaginaryCTF-2022 IrisCTF-2024 LITCTF-2022 LITCTF-2023 NBCTF-2023 PicoCTF-2022 PicoCTF-2023 SDCTF-2022 TAMUCTF-2023 VSCTF-2022

Stephen does some crypto problems, featuring AES CBC Bit Flipping!

SMPC

the one-time pad (OTP) is an encryption technique that cannot be cracked Wikipedia

random useless information

Morse code is well known. Can you decrypt this?

We found a leak of a blackmarket website's login credentials. Can you find the password of the user cultiris and successfully decrypt it?

A new modular challenge!

We found this weird message being passed around on the servers, we think we have a working decryption scheme.