How to submit encrypted file challenge cracks to the server
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Craft the usual PGP signed/encrypted email, but instead of sending the
individual plaintext, the challenge submissions should contain:

filename plaintext

Notice the space (' '), and there is no colon (':').

For example, if you cracked foo.bar and got the password 'thepassword',
you should submit to us:

foo.bar thepassword

In the case of challenges that are distributed in a container .zip file
(like this one), use the name of the container file.

You can mix this in with a submission of password cracks.  Unlike with
password crack submissions, you do not need to send us all your challenge
file cracks every time you crack a new challenge (although there is no
problem doing so, either).
