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/*
* Copyright 2017 Google Inc.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
syntax = "proto2";
package rlwe;
// NTT Polynomial
message SerializedNttPolynomial {
// Coefficients of the polynomial
optional bytes coeffs = 1;
// Number of coefficients of the polynomial.
optional int32 num_coeffs = 2;
}
// RLWE Ciphertext
message SerializedSymmetricRlweCiphertext {
// Polynomials composing the ciphertext
repeated SerializedNttPolynomial c = 1;
// The power of the secret key that the ciphertext is encrypted with.
optional int32 power_of_s = 2;
// A heuristic on the amount of error in the ciphertext.
optional double error = 3;
}
// RLWE RelinearizationKey
message SerializedRelinearizationKey {
// Polynomial composing the matrix
repeated SerializedNttPolynomial c = 1;
// The modulus used to decompose the coefficients of the polynomials. Ranges
// from 1 to the number of bits of the modulus.
optional int32 log_decomposition_modulus = 2;
// For n parts, the key can relinearize an n-component ciphertext to a
// 2-component ciphertext.
optional int32 num_parts = 3;
// Seed used to compress this key.
optional bytes prng_seed = 4; // Required
// The power of s that corresponds to the key. The field is 1 if the key is
// RelinearizationKey.
optional int32 power_of_s = 5;
}
// RLWE GaloisKeys.
message SerializedGaloisKey {
// The key-switching matrix
optional SerializedRelinearizationKey key = 1;
}
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