From: Gregory Brown <gregory.t.brown@...>
Date: 2008-08-03T14:29:00+09:00
Subject: Re: alphanumeric encrypt/decrypt

On Sun, Aug 3, 2008 at 1:19 AM, Ruby Facet <sechelon@ymail.com> wrote:
> Hello,
>
> Is there an encryption (decryption) routine that will return only
> alphanumeric characters? Looking forward to your help.

You could take any old routine and pack / unpack it as hex.  Would
that do the trick?

>> unpacked = "non-alpha numeric stuff: ^#%# foas".unpack("H*")
=> ["6e6f6e2d616c706861206e756d657269632073747566663a205e23252320666f6173"]
>> unpacked.pack("H*")
=> "non-alpha numeric stuff: ^#%# foas"

-greg

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