[Gpg4win-users-en] Users using PGP 8.0 can not decrypt attached files made in GPG4Win

Morten Abrahamsen morten at e-advice.dk
Tue May 25 16:43:15 CEST 2010

Thanks for your answers. 
Not sure if i should just reply to this will add it to the public list.
I hope so

To make sure we understand each other.

We mostly use Windows Outlook 2003-2007, no exchange server.

When I encrypt text in outlook mail window and decrypt, the PGP8 user can encrypt.
This is working well.

What is not working is if i browse using Windows Explore, find a file, right click "encrypt", then attach

The PGP8 user will save attachment and browse to the file, right click an Encrypt.

This is what is not working
I have tried to ecrypt as gpg and acs files, non of them work

Would that depend on E-mail client program?

Kind Regards Morten

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-----Original Message-----
From: Bernhard Reiter [mailto:bernhard at intevation.de] 
Sent: 25 May 2010 11:58
To: gpg4win-users-en at wald.intevation.org
Cc: Morten Abrahamsen
Subject: Re: [Gpg4win-users-en] Users using PGP 8.0 can not decrypt attached files made in GPG4Win

Hi Morten,

Am Montag, 17. Mai 2010 22:50:03 schrieb Morten Abrahamsen:
> We are moving from PGP8 to GPG4WIN w/Kleopatra

wonderful. Which version of Gpg4win did you test so far?

> Still many are using PGP8 as still using Windows XP
> My problem is that when some using GPG4Win sends an attached file to one
> using PGP 8.0, they can not open it.
> As long as file type is gpg, it does not even recognize it
> If I rename the .gpg to .pgp I can encrypt but the file is given a strange
> name. I then have to rename it to filen.extention and I can open it.

If you can decrypt it with the right file name, this means that the 
crypto-format it self is already compatible.
(It should be because the OpenPGP format, both are using was actuall developed 
for interoperability. For some history see 
http://en.wikipedia.org/wiki/Pretty_Good_Privacy#OpenPGP )
This is good.

> This is to complicated for many users
> There must be a setting in GPG4Win so it can be compatible with PGP 8
> I heared something about a gpg.conf file but not sure what options to add
> to get it to work

gpg.conf is about the crypto options. From your description above, the crypto 
option already seem to be alright so the gpg.conf options will not help you. 

The remaining issue will be about how the encrypted file is sent and received. 
The standard for this is PGP/MIME and I do not know if Outlook with PGP 8 is 
actually fulfilling the MIME requirement. From your description is seems like 
it does not. There is a non-MIME way to send crypto contents, but it has 
practical drawbacks (with file names and encodings) and it has to do with the 
email client. Which one do you want to use Outlook? (Without exchange?)


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