Question

read the excerpt from the code book. by this stage, sending a pgp encrypted message is becoming quite complicated. the idea cipher is being used to encrypt the message, rsa is being used to encrypt the idea key, and another stage of encryption has to be incorporated if a digital signature is required. however, zimmermann developed his product in such a way that it would do everything automatically, so that alice and bob would not have to worry about the mathematics. to send a message to bob, alice would simply write her e-mail and select the pgp option from a menu on her computer screen. next she would type in bobs name, then pgp would find bobs public key and automatically perform all the encryption. at the same time pgp would do the necessary jiggery - pokery required to digitally sign the message. upon receiving the encrypted message, bob would select the pgp option, and pgp would decrypt the message and verify which sentence is most relevant to the argument that zimmermanns pgp was easy to use? by this stage, sending a pgp encrypted message is becoming quite complicated. the idea cipher is being used to encrypt the message, rsa is being used to encrypt the idea key, and another stage of encryption has to be incorporated if a digital signature is required. to send a message to bob, alice would simply write her e - mail and select the pgp option from a menu on her computer screen. nothing in pgp was original—diffie and hellman had already thought of digital signatures and other cryptographers had used a combination of symmetric and asymmetric ciphers to speed up encryption...

Explanation:

To determine which sentence supports the argument that Zimmermann's PGP was easy to use, we look for details about simplicity in operation. The sentence "To send a message to Bob, Alice would simply write her e - mail and select the PGP option from a menu on her computer screen" shows a straightforward, user - friendly process. The other options either mention complexity ("becoming quite complicated", multiple encryption stages) or non - usability aspects (origins of PGP concepts).

Answer:

To send a message to Bob, Alice would simply write her e - mail and select the PGP option from a menu on her computer screen.