Electronic Mail and Internet Security - Codes: The Guide to Secrecy from Ancient to Modern Times - page 284

Diagram 8.7 PGP Message Reception, Decryption, and
Authentication

Passphrase

P

✎

Bob's Private
Key Ring

h

✍ ✌

h ( P )

.

I e B -index
−−−−−−−−→
select

−−−−−−−−−→
E h ( P ) ( d B )

E

I e B | ID B | E h ( P ) ( d B )

.

d B

I e B

BobReceives Message
I e B

e B ( k )
−−−−→

E k ( D A ) | | e B ( k ) d B ( e B ( k ))

E k ( D A )

k

E − 1
k

( E k ( D A )) = D A

−−−−→ ( e A ( d A ( h ( m ))) , m )

e A

✎

Bob's Public
Key Ring

m

✍ ✌

h ( m )

h

.

I e A -index
−−−−−−−−→
select

h ( m ) h ( m )

I e A | ID A | e A

.

h ( m ) h ( m )

Compare