Tiny board.
Real lessons.

Capture all 6 flags. Everything you need is inside this isolated network.

OPEN

1. Split Decision

Find why two layers disagree about the document they authorized.

Investigate
OPEN

2. False Identity

Cross an algorithm trust boundary using material recovered from the archive.

Investigate
OPEN

3. Quiet Oracle

Recover a protected credential from only a padding-validity signal.

Investigate
OPEN

4. Final Authority

Extend a signed command and discover how the ledger accepts it.

Investigate
OPEN

5. Nonce Encore

Recover a signing key from two signatures that reused one nonce.

Investigate
OPEN

6. Chained Forgery

Forge a variable-length CBC-MAC message from two valid one-block tags.

Investigate

Submit a flag

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