New
#1
I always thought that PGP wasn't that good of an encryption standard to use. Instead, I think perhaps a one time pad implantation should be used. The only issue is trying to pass the pad securely. Perhaps that part can be done with AES 256 or ECC or something. Perhaps even a cascade of ciphers like AES 256, ECC and Blowfish. But then again, the whole E-mail could use a cascade of ciphers as well. It's just that a one time pad is uncrackable providing it's used correctly and the pad is never reused.
Perhaps in the corporate environment a digital one time pad can be generated at the office using a type of synchronous USD fob.