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diff --git a/libparc/parc/security/parc_CryptoHashType.h b/libparc/parc/security/parc_CryptoHashType.h
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+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * 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:
+ *
+ *     http://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.
+ */
+
+/**
+ * @file parc_CryptoHashType.h
+ * @ingroup security
+ * @brief A type specifying a cryptographic hash (or CRC check) algorithm.
+ *
+ * This type is overloaded to support both cryptographic hash digest algorithms and cyclical-reduncancy
+ * check (CRC) algorithms. See the available `PARCCryptoHashType` enum types for an exhaustive
+ * list of the supported algorithms.
+ *
+ */
+#ifndef libparc_parc_CryptoHashType_h
+#define libparc_parc_CryptoHashType_h
+
+typedef enum {
+    PARCCryptoHashType_SHA256,
+    PARCCryptoHashType_SHA512,
+    PARCCryptoHashType_CRC32C,
+    PARCCryptoHashType_NULL
+} PARCCryptoHashType;
+
+/**
+ * Convert the `PARCCryptoHashType` value to a human-readable string representation.
+ *
+ * @param [in] type A `PARCCryptoHashType` value
+ *
+ * @return A static, null-terminated string.
+ *
+ * Example:
+ * @code
+ * {
+ *     PARCCryptoHashType type = PARCCryptoHashType_SHA256;
+ *     const char *stringRep = parcCryptoHashType_ToString(type);
+ *     // use stringRep as necessary, and then free
+ * }
+ * @endcode
+ */
+const char *parcCryptoHashType_ToString(PARCCryptoHashType type);
+
+/**
+ * Convert a string representation value of a `PARCCryptoHashType` to an actual value.
+ *
+ * @param [in] name A string representation of a `PARCCryptoHashType` value.
+ *
+ * @return A `PARCCryptoHashType` value.
+ *
+ * Example:
+ * @code
+ * {
+ *     const char stringRep[17] = "PARCCryptoHashType_SHA256";
+ *     PARCCryptoHashType type = parcCryptoHashType_FromString(stringRep);
+ *     // use stringRep as necessary, and then free
+ * }
+ * @endcode
+ */
+PARCCryptoHashType parcCryptoHashType_FromString(const char *name);
+#endif // libparc_parc_CryptoHashType_h