You can take a look at ccrypt (ccrypt.sf.net) if it's about file encryption, but I don't know if it wil work on plan9. I've only compiled it with the called "gnu configure machinery".

2006/3/27, Fernan Bolando <fernanbolando@mailc.net>:
On 3/27/06, Steve Simon <steve@quintile.net> wrote:
> If you are just looking for file encryption then
> auth/aescbc will do that for you. A little script
> would allow you to validate a locally held md5sum
> digest of the file to inform you of any tampering.
> Aescbc is not portable outside of plan9 - p9p not
> withstanding.
>
> -Steve
>

I am trying to get some sort of encyption. Protability between p9, linux and
windows is a bit critical for my application ( I am paranoid ).

I am currently considering blowfish because it's available on most machines.

Of course gnupg would be best.

,Fernan
--
Public PGP/GnuPG key ( http://www.fernski.com)
pub 1024D/3576CA71 2006-02-02 Fernan Bolando
Key fingerprint = FDFE C9A8 FFED C1A5 2F5C EFEB D595 AF1C 3576 CA71