ECB Art
Problem Description
An image containing a secret message (the flag) was encrypted using AES-128 in ECB mode. Although ECB hides the colors, it preserves identical 16-byte blocks which leak the structure of the picture. Your job is to analyze the provided encrypted file, recognize the ECB leak, and recover the flag.
What you get: one encrypted BMP file ecb_art.bmp.enc.
Goal: recover the flag.
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Frequently Asked Questions
This is a easy level problem worth 30 points.
This is a ctf challenge problem in the Cryptography category.
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