Proteus

syndir

Study the dossier, recover the target data, and transmit the captured flag to command. Nereid

Transmissions Briefing Nereid archival maintenance sealed each cold vault behind a shape-shifting keygen stub: a maintenance binary that folds any passphrase through a chain of reversible transforms and unlocks only when the chain lands on the value it holds in mind. It hides nothing and simply dares you to run the current backwards. This one still guards a live archive.

Note: submit in the format uctf{serial}.