recommendations for encrypting a document on a distributed CD?

2011-11-02 Thread Joe Flowers
Hello Everyone, I would like recommendations and suggestions for encrypting a document on a distributed CD. I would like someone to be able to open and read the document only if they have a password or secret string or other(?). I understand there is a limit to how secure this really is, but I

Re: recommendations for encrypting a document on a distributed CD?

2011-11-02 Thread Joe Flowers
PGP? On Wed, Nov 2, 2011 at 8:27 AM, Joe Flowers joe.flow...@nofreewill.comwrote: Hello Everyone, I would like recommendations and suggestions for encrypting a document on a distributed CD. I would like someone to be able to open and read the document only if they have a password or

Re: recommendations for encrypting a document on a distributed CD?

2011-11-02 Thread Michael S. Zick
On Wed November 2 2011, Joe Flowers wrote: PGP? Password protected PDF? Mike On Wed, Nov 2, 2011 at 8:27 AM, Joe Flowers joe.flow...@nofreewill.comwrote: Hello Everyone, I would like recommendations and suggestions for encrypting a document on a distributed CD. I would like

Re: recommendations for encrypting a document on a distributed CD?

2011-11-02 Thread Jakob Bohm
This is a classic FAQ (it is in the very old crypto FAQ), but I will give a more detailed explanation of the standard answer. This is impossible! Once you give any user a password to the file, then he can secretly share it with other people with the same CD (because nothing on the CD can be

Re: recommendations for encrypting a document on a distributed CD?

2011-11-02 Thread Jonas Schnelli
PGP? Hi I would look at the openPGP specs. http://en.m.wikipedia.org/wiki/OpenPGP#OpenPGP I think you can solve your projects requirements with GnuPG. If you like to weld it better with you software project, you might look at Gpgme (http://www.gnupg.org/related_software/gpgme/). It's