Challenge

We’re given an image and the text “Seed: NV-C”. The description references the Library of Babel.

Approach

  1. Examine the image for steganography. The residual pixel values (pixels that differ from a solid background) encode note indices.
  2. Navigate to libraryofbabel.info and search for seed NV-C.
  3. Use the pixel-encoded indices to pick specific characters/notes from that seed’s page.
  4. Reassemble the indexed characters to spell out the flag.

Flag

boroCTF{oneSeedCipherInInfinity}