Anais - Engenharia de Redes de Comunicação - UnB

• This configuration is only possible for a t−1
i+1 = 1.
Configuration 2.3
(
a
t−1
i−1
a t−1
i
a t−1
i+1
x a t i x
• This configuration is not possible.
Configuration 2.4
(
a
t−1
i−1
a t−1
i
a t−1
i+1
x a t i x
If the attacker flips the bit a t−1
i
possibilities:
• If a t i = 1, then a t−1
i+1 = 1.
• If a t i = 0, then a t−1
i+1 = 0.
Configuration 2.5
(
a
t−1
i−1
a t−1
i
)
)
=
=
(
0 1 a
t−1
i+1
x 0 x
(
0 1 a
t−1
i+1
x 1 x
)
)
and then recomputes the bit a t i, there will be two
a t−1
i+1
x a t i x
)
=
(
1 0 a
t−1
i+1
x 0 x
• This configuration is only possible for a t−1
i+1 = 1.
Configuration 2.6
(
a
t−1
i−1
a t−1
i
a t−1
i+1
x a t i x
)
=
(
1 0 a
t−1
i+1
x 1 x
• This configuration is only possible for a t−1
i+1 = 0.
Configuration 2.7
(
a
t−1
i−1
a t−1
i
a t−1
i+1
x a t i x
If the attacker flips the bit a t−1
i
possibilities:
• If a t i = 1, then a t−1
i+1 = 0.
• If a t i = 0, then a t−1
i+1 = 1.
Configuration 2.8
(
a
t−1
i−1
a t−1
i
)
=
(
1 1 a
t−1
i+1
x 0 x
)
)
)
and then recomputes the bit a t i, there will be two
a t−1
i+1
x a t i x
)
=
(
1 1 a
t−1
i+1
x 1 x
)
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