diff --git a/ndn-cpp/c/PublisherPublicKeyDigest.h b/ndn-cpp/c/PublisherPublicKeyDigest.h
new file mode 100644
index 0000000..57b85f2
--- /dev/null
+++ b/ndn-cpp/c/PublisherPublicKeyDigest.h
@@ -0,0 +1,35 @@
+/**
+ * @author: Jeff Thompson
+ * See COPYING for copyright and distribution information.
+ */
+
+#ifndef NDN_PUBLISHERPUBLICKEYDIGEST_H
+#define	NDN_PUBLISHERPUBLICKEYDIGEST_H
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/**
+ * A PublisherPublicKeyDigest holds a pointer to the publisher public key digest value, if any.
+ * We make a separate struct since this is used by multiple other structs.
+ */
+struct ndn_PublisherPublicKeyDigest {
+	unsigned char *publisherPublicKeyDigest;      /**< pointer to pre-allocated buffer.  0 for none */
+  unsigned int publisherPublicKeyDigestLength;  /**< length of publisherPublicKeyDigest.  0 for none */  
+};
+
+/**
+ * Initialize an ndn_PublisherPublicKeyDigest struct with 0 for none.
+ */
+static inline void ndn_PublisherPublicKeyDigest_init(struct ndn_PublisherPublicKeyDigest *self)
+{
+  self->publisherPublicKeyDigest = 0;
+  self->publisherPublicKeyDigestLength = 0;
+}
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif