Unknown file encryption

From: Josiah (josiahdykstra@hotmail.com)
Date: 04/09/03 

From: josiahdykstra@hotmail.com (Josiah)
Date: 9 Apr 2003 09:34:57 -0700

I have several files that I know are encrypted, but don't know what
algorithm was used, let alone the passphrase. One file looks like
this:

å8SF^Y¼~K^C1ÌCfy~@7wÔúZz}^BYXÉSsÐ~O¨~M¸c9W~HÙ8ÅÕ~\ÁâT¾~DÁ~Z~G¡}?p¢

How can I go about determing what encryption program was used (crypt,
pgp, des, etc.)? From what I can tell, it doesn't appear to be pgp or
des. Since there are non-standard ASCII characters in the file, I
assume it must be a non-trivial algorithm (ie, not a substitution
cipher etc.)

Thanks for the help.

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