CTF Challenges
48 challenges
Ghost Writer
An automated memo service saves whatever you write. The developers reused code from an older echo service, and old...
Chain Reaction
A control system for initiating chain reactions has a familiar input flaw. But the security has been upgraded, and old...
Dead Drop
A classified note system lets agents create, view, and delete secret messages. But the cleanup protocol has a flaw, and...
Library Card
The city library's card reader accepts patron credentials. But something about the way it processes input feels off -...
Broken Record
A secret was hidden, but the same key was used over and over. Repetition is the enemy of secrecy. Ciphertext (hex):...
Paper Tiger
These numbers look impossibly large, but looks can be deceiving. Not everything needs brute force. Public Key:...
Bad Neighbors
Two separate keys were generated for two separate systems. But corners were cut during key generation, and now they...
Facade
NexGen Dynamics recently landed a government contract. Something about this company doesn't add up. Investigate their...
Alias
Intelligence suggests that the user nightowl99 on the Chatter platform is a person of interest. Their current profile...