seal_fhe 0.8.1

This crate contains Rust bindings for Microsoft's SEAL Fully Homomorphic Encryption (FHE) library.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269

// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.

#include "seal/seal.h"
#include "seal/util/rlwe.h"
#include "bench.h"

using namespace benchmark;
using namespace sealbench;
using namespace seal;
using namespace std;

/**
This file defines benchmarks for CKKS-specific HE primitives.
*/

namespace sealbench
{
    void bm_ckks_encrypt_secret(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        Plaintext &pt = bm_env->pt()[0];
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_pt_ckks(pt);

            state.ResumeTiming();
            bm_env->encryptor()->encrypt_symmetric(pt, ct[2]);
        }
    }

    void bm_ckks_encrypt_public(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        Plaintext &pt = bm_env->pt()[0];
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_pt_ckks(pt);

            state.ResumeTiming();
            bm_env->encryptor()->encrypt(pt, ct[2]);
        }
    }

    void bm_ckks_decrypt(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        Plaintext &pt = bm_env->pt()[0];
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);

            state.ResumeTiming();
            bm_env->decryptor()->decrypt(ct[0], pt);
        }
    }

    void bm_ckks_encode_double(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<double> &msg = bm_env->msg_double();
        Plaintext &pt = bm_env->pt()[0];
        parms_id_type parms_id = bm_env->context().first_parms_id();
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_message_double(msg);

            state.ResumeTiming();
            bm_env->ckks_encoder()->encode(msg, parms_id, scale, pt);
        }
    }

    void bm_ckks_decode_double(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<double> &msg = bm_env->msg_double();
        Plaintext &pt = bm_env->pt()[0];
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_pt_ckks(pt);

            state.ResumeTiming();
            bm_env->ckks_encoder()->decode(pt, msg);
        }
    }

    void bm_ckks_add_ct(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_ct_ckks(ct[1]);
            ct[1].scale() = scale;
            state.ResumeTiming();
            Ciphertext res;
            bm_env->evaluator()->add(ct[0], ct[1], res);
        }
    }

    void bm_ckks_add_pt(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        Plaintext &pt = bm_env->pt()[0];
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_pt_ckks(pt);
            pt.scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->add_plain(ct[0], pt, ct[2]);
        }
    }

    void bm_ckks_negate(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->negate(ct[0], ct[2]);
        }
    }

    void bm_ckks_sub_ct(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_ct_ckks(ct[1]);
            ct[1].scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->sub(ct[0], ct[1], ct[2]);
        }
    }

    void bm_ckks_sub_pt(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        Plaintext &pt = bm_env->pt()[0];
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_pt_ckks(pt);
            pt.scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->sub_plain(ct[0], pt, ct[2]);
        }
    }

    void bm_ckks_mul_ct(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_ct_ckks(ct[1]);
            ct[1].scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->multiply(ct[0], ct[1], ct[2]);
        }
    }

    void bm_ckks_mul_pt(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        Plaintext &pt = bm_env->pt()[0];
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_pt_ckks(pt);
            pt.scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->multiply_plain(ct[0], pt, ct[2]);
        }
    }

    void bm_ckks_square(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        double scale = bm_env->safe_scale();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;
            bm_env->randomize_ct_ckks(ct[1]);
            ct[1].scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->square(ct[0], ct[2]);
        }
    }

    void bm_ckks_rescale_inplace(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        double scale = bm_env->safe_scale() * pow(2.0, 20);
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);
            ct[0].scale() = scale;

            state.ResumeTiming();
            bm_env->evaluator()->rescale_to_next_inplace(ct[0]);
        }
    }

    void bm_ckks_relin_inplace(State &state, shared_ptr<BMEnv> bm_env)
    {
        Ciphertext ct;
        for (auto _ : state)
        {
            state.PauseTiming();
            ct.resize(bm_env->context(), size_t(3));
            bm_env->randomize_ct_ckks(ct);

            state.ResumeTiming();
            bm_env->evaluator()->relinearize_inplace(ct, bm_env->rlk());
        }
    }

    void bm_ckks_rotate(State &state, shared_ptr<BMEnv> bm_env)
    {
        vector<Ciphertext> &ct = bm_env->ct();
        for (auto _ : state)
        {
            state.PauseTiming();
            bm_env->randomize_ct_ckks(ct[0]);

            state.ResumeTiming();
            bm_env->evaluator()->rotate_vector(ct[0], 1, bm_env->glk(), ct[2]);
        }
    }
} // namespace sealbench