Set some parameters.
Set a working seed for random numbers
Create the secret key and the polynomials a and e, which will go into the public key
# generate a secret key
s = GenSecretKey(n)
# generate a
a = GenA(n, q)
# generate the error
e = GenError(n)
Generate the public key.
Create a polynomial message
Create polynomials for the encryption
Generate the ciphertext
m1_ct0 = pk0*u + p*e1 + m1
m1_ct0 = m1_ct0 %% pm
m1_ct0 = CoefMod(m1_ct0, q)
m1_ct1 = pk1*u + p*e2
m1_ct1 = m1_ct1 %% pm
m1_ct1 = CoefMod(m1_ct1, q)
m2_ct0 = pk0*u + p*e1 + m2
m2_ct0 = m2_ct0 %% pm
m2_ct0 = CoefMod(m2_ct0, q)
m2_ct1 = pk1*u + p*e2
m2_ct1 = m2_ct1 %% pm
m2_ct1 = CoefMod(m2_ct1, q)
EvalAdd
Decrypt