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Secret Sharing and Secure Computation
Splitting a secret so that any t shares reveal it and any t−1 reveal nothing, and computing on data nobody is allowed to see.
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In a
(
k
,
n
)
(k,n)
(
k
,
n
)
-threshold scheme with
k
=
3
k=3
k
=
3
and
n
=
7
n=7
n
=
7
,
what is the smallest number of shares that suffices to reconstruct the secret?
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n
k
( )
x
n
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AC
7
8
9
+
4
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6
−
1
2
3
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0
.
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b
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