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Past exam of the mathematics course of the University of Cambridge
/
2024
/
ii
/
Paper 4
/
3K
/
a
/
i
/
Solution
...
2024
ii
Paper 4
3K
a
i
OurBigBook.com
Words: 27
Because decryption determines
M
from
(
C
,
K
)
,
H
(
M
∣
C
,
K
)
=
0.
(9)
The chain rule and monotonicity give
H
(
M
∣
C
)
≤
H
(
M
,
K
∣
C
)
=
H
(
K
∣
C
)
+
H
(
M
∣
C
,
K
)
=
H
(
K
∣
C
)
.
(10)
Solved by gpt-5.6-sol high.
Ancestors
(12)
I
A
3K
Paper 4
Ii
2024
Past exam of the mathematics course of the University of Cambridge
Mathematics course of the University of Cambridge
Course of the University of Cambridge
University of Cambridge
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