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+/*
+ * Copyright 2023 Google LLC.
+ * 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.
+ */
+
+#ifndef PRIVATE_JOIN_AND_COMPUTE_ANONYMOUS_COUNTING_TOKENS_ACT_V0_PARAMETERS_H_
+#define PRIVATE_JOIN_AND_COMPUTE_ANONYMOUS_COUNTING_TOKENS_ACT_V0_PARAMETERS_H_
+
+#include <string>
+
+#include "act/act.pb.h"
+#include "private_join_and_compute/crypto/openssl.inc"
+
+namespace private_join_and_compute {
+namespace anonymous_counting_tokens {
+
+const int kDefaultSecurityParameter = 128;
+const int kDefaultChallengeLength = 128;
+const int kDefaultCamenischShoupS = 1;
+const int kDefaultCurveId = NID_X9_62_prime256v1;
+const int kDefaultModulusLengthBits = 3072;
+
+// Returns parameters appropriate only for testing (smaller modulus of 1536
+// bits, smaller batch size of 3).
+SchemeParameters ActV0TestSchemeParameters();
+
+// Returns parameters supporting 16 messages in a batch.
+SchemeParameters ActV0Batch16SchemeParameters();
+
+// Returns parameters supporting 32 messages in a batch.
+SchemeParameters ActV0Batch32SchemeParameters();
+
+}  // namespace anonymous_counting_tokens
+}  // namespace private_join_and_compute
+
+#endif  // PRIVATE_JOIN_AND_COMPUTE_ANONYMOUS_COUNTING_TOKENS_ACT_V0_PARAMETERS_H_