password protect/encrypt a single image
 

I would liek an easy way to password protect/encrypt 1 single file that will be ftp'ed between computers. I am not so worried about others picking up the ftp transfer, rather I am worried about prying eyes on ither machine trying to open the file. Also, I need this to be compatible with windows and linux. Any ideas? Somehting simple would suffice.. I dont mean chmod or anything elementary,.

thanks

Sounds like you need to setup Gnu Privacy Guard (GPG)at your end, and some version of PGP at the other (unless GPG is availble for windows). This will allow you to encrypt and (if you want) sign the file too.

cheers

Jamie...

or you could just creat a password protected zip file. I don't know how well the unzip program for linux handles the password protection, but still.

YES, there are many problems that would just break the encryption of the zip... and yes, the PGP is pretty hard to decrypt... but it's still possible. And anyone with the knowldege to brak a zip encryption could find a way to break a pgp (not easy, but possible).

Anyway, what's so important? I mean... if it REALLY is important to avoid any kind of violation, then just burn it to a CD-R and keep it in a safe place... As long as it's in any digital media a person has access, it's possible to decrypt it. Even the Shadow encryption is possible to break. (through brute force, but still possible)