•
Trang 3E
m1,0 1,0 1,1
c1 1,b
Trang 4E
m2,0 2,0 2,1
c2 2,b
Trang 5E
AdvCPA E |
mi,0 i,0 i,1
ci i,b
j,0 j,1=m
Trang 6m 0
b
m 0 0
c0 0
0
Trang 7m 0
b
m 0 0
c0 0
0
Trang 8⇒
⇒
m
m
Trang 9[ ( ) ]
Trang 10•
–
–
•
Alice
E
m, n E(k,m,n)=c
Bob
D
c, n D(k,c,n)=m
Trang 11AdvnCPA E |
ni
Trang 12[ ( ) ]