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    Welcome to the Forum for the 21st National Cipher Challenge, The Empty Vault.

    This is a great (and safe) place to give us feedback, to ask questions, to support one another and to spend some time getting to know the others taking part. To keep it that way we have a few simple rules:

    Be friendly
    Keep on topic (start a new thread if you want to veer off in a new direction)
    Don’t publish anything which you would be embarrassed about later
    Don’t publish anything which gives away your identity

    If you are unsure about anything or there is anything we can help with that you don’t want to make public, then email us at [email protected]. We are always pleased to hear from you.

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