Nothing
## ----include = FALSE----------------------------------------------------------
knitr::opts_chunk$set(
collapse = TRUE,
comment = "#>"
)
## ----setup--------------------------------------------------------------------
library(polynom)
library(HomomorphicEncryption)
## ----params-------------------------------------------------------------------
d = 4
n = 2^d
p = (n/2)-1
q = 874
## -----------------------------------------------------------------------------
set.seed(123)
## ----GenPolyMod---------------------------------------------------------------
pm = polynomial( coef=c(1, rep(0, n-1), 1 ) )
print(pm)
## -----------------------------------------------------------------------------
# generate a secret key
s = GenSecretKey(n)
print(s)
## -----------------------------------------------------------------------------
# generate a
a = GenA(n, q)
print(a)
## -----------------------------------------------------------------------------
e = GenError(n)
print(e)
## -----------------------------------------------------------------------------
pk0 = GenPubKey0(a, s, e, pm, q)
print(pk0)
## -----------------------------------------------------------------------------
pk1 = GenPubKey1(a)
## -----------------------------------------------------------------------------
# create a message
m = polynomial( coef=c(6, 4, 2) )
## -----------------------------------------------------------------------------
# polynomials for encryption
e1 = GenError(n)
e2 = GenError(n)
u = GenU(n)
print(u)
## -----------------------------------------------------------------------------
ct0 = EncryptPoly0(m, pk0, u, e1, p, pm, q)
print(ct0)
## -----------------------------------------------------------------------------
ct1 = EncryptPoly1( pk1, u, e2, pm, q)
print(ct1)
## -----------------------------------------------------------------------------
decrypt = (ct1 * s) + ct0
decrypt = decrypt %% pm
decrypt = CoefMod(decrypt, q)
# rescale
decrypt = decrypt * p/q
## -----------------------------------------------------------------------------
# round then mod p
decrypt = CoefMod(round(decrypt), p)
print(decrypt)
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