Oo, nice! And with inspiration once again from btrott's substitution approach: 
sub canonical {
($_,$a,%h)=@_;s/./substr"a$a",$h{$&}||=keys%h,1/gse;$_
}

[download]
Back down to 54!

In reply to Re: Re: Re: (Golf) Cryptographer's Tool #1 by chipmunk
in thread (Golf) Cryptographer's Tool #1 by Masem

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