use strict;
use warnings;
my %hash;
my $a = '1};print "You have just been cracked!\n";#a1:a2:a3=foo';
my ($key, $val) = split /=/, $a, 2;
$key =~ s/:/}{/g;
eval "\$hash{$key}=\"$val\"";
__END__
You have just been cracked!