Time Traveler

Written by RussA / PG: Parental Guidance Suggested
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It's a Playfair cipher. I'm sure you know how that works since you're a cryptographer. But I don't know the key, so I can't decipher it. It would be a key provided by the ANZAC intelligence people to the coastwatchers. Can you decipher it?

You have 1 choice:

Room 158539 created by RussA on Jun 1, 2019
Previous Rooms: 158537 (fijibase)