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diff --git a/cc/signature/ed25519_public_key.h b/cc/signature/ed25519_public_key.h
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+++ b/cc/signature/ed25519_public_key.h
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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
+//
+//      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.
+//
+////////////////////////////////////////////////////////////////////////////////
+
+#ifndef TINK_SIGNATURE_ED25519_PUBLIC_KEY_H_
+#define TINK_SIGNATURE_ED25519_PUBLIC_KEY_H_
+
+#include <string>
+
+#include "absl/types/optional.h"
+#include "tink/partial_key_access_token.h"
+#include "tink/signature/ed25519_parameters.h"
+#include "tink/signature/signature_public_key.h"
+#include "tink/util/statusor.h"
+
+namespace crypto {
+namespace tink {
+
+class Ed25519PublicKey : public SignaturePublicKey {
+ public:
+  // Copyable and movable.
+  Ed25519PublicKey(const Ed25519PublicKey& other) = default;
+  Ed25519PublicKey& operator=(const Ed25519PublicKey& other) = default;
+  Ed25519PublicKey(Ed25519PublicKey&& other) = default;
+  Ed25519PublicKey& operator=(Ed25519PublicKey&& other) = default;
+
+  // Creates a new Ed25519 public key from `public_key_bytes`. If `parameters`
+  // specify a variant that uses a prefix, then `id_requirement` is used to
+  // compute this prefix.
+  static util::StatusOr<Ed25519PublicKey> Create(
+      const Ed25519Parameters& parameters, absl::string_view public_key_bytes,
+      absl::optional<int> id_requirement, PartialKeyAccessToken token);
+
+  absl::string_view GetPublicKeyBytes(PartialKeyAccessToken token) const {
+    return public_key_bytes_;
+  }
+
+  absl::string_view GetOutputPrefix() const override { return output_prefix_; }
+
+  const Ed25519Parameters& GetParameters() const override {
+    return parameters_;
+  }
+
+  absl::optional<int> GetIdRequirement() const override {
+    return id_requirement_;
+  }
+
+  bool operator==(const Key& other) const override;
+
+ private:
+  explicit Ed25519PublicKey(const Ed25519Parameters& parameters,
+                            absl::string_view public_key_bytes,
+                            absl::optional<int> id_requirement,
+                            absl::string_view output_prefix)
+      : parameters_(parameters),
+        public_key_bytes_(public_key_bytes),
+        id_requirement_(id_requirement),
+        output_prefix_(output_prefix) {}
+
+  Ed25519Parameters parameters_;
+  std::string public_key_bytes_;
+  absl::optional<int> id_requirement_;
+  std::string output_prefix_;
+};
+
+}  // namespace tink
+}  // namespace crypto
+
+#endif  // TINK_SIGNATURE_ED25519_PUBLIC_KEY_H_