gdbe - how?

[h p]

I feel I'm bombarding the list with stupid questions, but I really
can't find an answer to this.
I'd like to use the gdbe disk encryption. I have activated GEOM_BDE in
my kernel and would like to go ahead with the procedure described in
the handbook. But I don't have a gdbe executable anywhere on my
system. Neither a manpage or a port with a name obviously related to
gdbe, for that matter.
Where do I find it?
Thanks
Helge