Proof of Tampering

Proof of Tampering is a math-forensics campaign. You play a forensic analyst hired to reconstruct what really happened when a research notebook vanished from the Meridian Institute.

Each stage is self-contained, but the campaign has a narrative thread: every solved challenge reveals one more piece of the case board. The final stage uses evidence recovered from earlier stages.

You'll work through modular arithmetic, timeline reconstruction, steganography, forensic accounting, graph ordering, RSA, affine ciphers, and a final Vigenère-style reconstruction. Flags are lowercase words separated by underscores.

Eight stages. The evidence doesn't lie, but someone tried to make it.