February 19, 2002
Practical Aspects of Modern Cryptography
36
Secret Sharing Homomorphisms
nTHRESHOLD
n
nSecret:  P1(0)  –  Shares:  P1(1), P1(2), …, P1(n)
nSecret:  P2(0)  –  Shares:  P2(1), P2(2), …, P2(n)
n
nSecret sum:  P1(0) + P2 (0)
nShare sums:  P1(1) + P2 (1), P1(2) + P2 (2), …, P1(n) + P2 (n)