Anti Flag: reverse the validation logic, model the transform, and recover the accepted input.
gamepwnlocked
Writeups
380 postshardwarelocked
Bare Metal
hardwarelocked
Project Power
hardwarelocked
Bounty Head
hardwarelocked
Debugging Interface
weblocked
Interstellar
hardwarelocked
Mission Pinpossible
hardwarelocked
RFlag
rev
Anti Flag
misc
Art
Art: reduce the custom rules to a scriptable check and use the smallest reliable path to the flag.
rev
Baby Crypt
Baby Crypt: recover the XOR transform from the binary and invert it to reveal the flag.
rev
Baby RE
Baby RE: trace the binary, isolate the validation routine, and invert it to recover the flag.
rev
Eat the Cake!
Eat the Cake: reverse the validation logic, model the transform, and recover the accepted input.
rev
Encryption Bot
Encryption Bot: reverse the validation logic, model the transform, and recover the accepted input.
rev
Impossible Password
Impossible Password: recover the XOR transform from the binary and invert it to reveal the flag.
crypto
Inside the Matrix
Inside the Matrix: turn the RSA leak into a lattice recovery, rebuild the secret values, and decrypt the flag.
rev
IRCWare
IRCWare: reverse the validation logic, model the transform, and recover the accepted input.
crypto
Jenny From The Block
Jenny From The Block: reduce the hash constraint to a small search, test candidates, and recover the flag.
crypto
Living with Elegance
Living with Elegance: model the crypto leak, recover the missing secret, and decrypt the flag.
crypto
Lost Modulus
Lost Modulus: exploit the RSA structure, recover the missing secret, and decrypt the flag.
crypto
LunaCrypt
LunaCrypt: derive the XOR key stream, invert the transform, and recover the flag.
crypto
Mayday Mayday
Mayday Mayday: model the leak as a small lattice problem, recover the secret, and verify the flag.
rev
Metagaming
Metagaming: reverse the validation logic, model the transform, and recover the accepted input.
crypto
MSS
MSS: exploit the RSA structure, recover the missing secret, and decrypt the flag.
rev
Ouija
Ouija: reverse the validation logic, model the transform, and recover the accepted input.
rev
Ransom
Ransom: reverse the validation logic, model the transform, and recover the accepted input.
pwn
Rebuilding
Rebuilding: build the exploit primitive, stabilize the payload, and use it to read the flag.
rev
Secured Transfer
Secured Transfer: reverse the validation logic, model the transform, and recover the accepted input.