The Black Cipher Protocol

The Black Cipher Protocol: A five-digit authorization is buried under misleadingly informative probes. Original constraint deduction puzzle with a mathematically certified unique solution.

Original puzzle evidence

A five-digit authorization is buried under misleadingly informative probes.

THE BLACK CIPHER · EXTREME

1. Probe 01283: 0 exact, 2 misplaced
2. Probe 57231: 0 exact, 3 misplaced
3. Probe 26784: 0 exact, 3 misplaced
4. Probe 98451: 0 exact, 2 misplaced
5. Probe 17528: 0 exact, 2 misplaced
6. Probe 92570: 1 exact, 2 misplaced
7. Probe 38916: 2 exact, 0 misplaced
8. Probe 50973: 1 exact, 2 misplaced

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