[NTLUG:Discuss] Good encryption program for Linux and Windows

[Leroy Tennison]

I have a need to send an encrypted file to another person who uses 
Windows.  Needless to say, I run Linux, if I have to use Windows I'm 
going to have to reinstall Windows 98se (it's the latest I have since I 
abandoned Windows some time ago) on a hard drive, install some program, 
copy the file to Windows, encrypt it, copy it back to Linux and send it. 
   Needless to say, I'd prefer to not do that.

I am looking for a program which I can use to encrypt the file on Linux 
and, when the other person receives it, can simply run it as a program 
on Windows (providing the decryption key I communicate by other means) 
and have the decrypted copy.  Any ideas?