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A comment on Solving the Australian Signals Directorate cryptography challenge coin. Parent comment

Re:Solving the Australian Signals Directorate cryptography c... by goldenkey on Sunday September 04, 2022 @03:05PM (#32716554)
To elaborate, a challenge-coin would be awarded for achievement or entry into a prestigious group. The coin is usually decorative but contains no challenges in itself.

In this case, the coin contains challenges, and anyone can purchase it - rather than it being awarded.

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