← All Challenges

Penguin Shadows

Cryptography 150 pts standard
Challenge Description

Agent, FrostByte Labs encrypted a classified Arctic transmission using AES encryption. Their engineers believed the image was fully secure. However, analysts noticed strange shadows leaking through the encrypted file. Investigate the encrypted image and identify the cryptographic weakness.

Author - prap

Files
↓ encrypted_frost.bmp
Hints
View Hint

Strong encryption can still reveal patterns when identical blocks are treated the same way

Submit Flag

Login to submit a flag.