diff --git a/NEWS b/NEWS
index 0746178c5..069bb2c08 100644
--- a/NEWS
+++ b/NEWS
@@ -17,6 +17,14 @@ New features:
   around passkey use cases.
 * Added `Automatic-Module-Name` to jar manifest.
 
+Fixes:
+
+* `AuthenticatorAttestationResponse` now tolerates and ignores properties
+  `"publicKey"` and `"publicKeyAlgorithm"` during JSON deserialization. These
+  properties are emitted by the `PublicKeyCredential.toJSON()` method added in
+  WebAuthn Level 3.
+
+
 `webauthn-server-attestation`:
 
 New features:
diff --git a/webauthn-server-core/src/main/java/com/yubico/webauthn/data/AuthenticatorAttestationResponse.java b/webauthn-server-core/src/main/java/com/yubico/webauthn/data/AuthenticatorAttestationResponse.java
index 0a33448db..29ba7e3ec 100644
--- a/webauthn-server-core/src/main/java/com/yubico/webauthn/data/AuthenticatorAttestationResponse.java
+++ b/webauthn-server-core/src/main/java/com/yubico/webauthn/data/AuthenticatorAttestationResponse.java
@@ -26,6 +26,7 @@
 
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.yubico.internal.util.CollectionUtil;
 import com.yubico.webauthn.data.exception.Base64UrlException;
@@ -49,6 +50,7 @@
  *     Information About Public Key Credential (interface AuthenticatorAttestationResponse) </a>
  */
 @Value
+@JsonIgnoreProperties({"publicKey", "publicKeyAlgorithm"})
 public class AuthenticatorAttestationResponse implements AuthenticatorResponse {
 
   /**
diff --git a/webauthn-server-core/src/test/scala/com/yubico/webauthn/data/JsonIoSpec.scala b/webauthn-server-core/src/test/scala/com/yubico/webauthn/data/JsonIoSpec.scala
index 1bcdb5d37..3fe9a73c5 100644
--- a/webauthn-server-core/src/test/scala/com/yubico/webauthn/data/JsonIoSpec.scala
+++ b/webauthn-server-core/src/test/scala/com/yubico/webauthn/data/JsonIoSpec.scala
@@ -25,10 +25,12 @@
 package com.yubico.webauthn.data
 
 import com.fasterxml.jackson.core.`type`.TypeReference
+import com.fasterxml.jackson.databind.JsonNode
 import com.fasterxml.jackson.databind.ObjectMapper
 import com.fasterxml.jackson.databind.exc.ValueInstantiationException
 import com.fasterxml.jackson.databind.json.JsonMapper
 import com.fasterxml.jackson.databind.node.BooleanNode
+import com.fasterxml.jackson.databind.node.JsonNodeFactory
 import com.fasterxml.jackson.databind.node.ObjectNode
 import com.fasterxml.jackson.databind.node.TextNode
 import com.fasterxml.jackson.datatype.jdk8.Jdk8Module
@@ -44,6 +46,7 @@ import com.yubico.webauthn.extension.appid.Generators._
 import org.junit.runner.RunWith
 import org.scalacheck.Arbitrary
 import org.scalacheck.Arbitrary.arbitrary
+import org.scalacheck.Gen
 import org.scalatest.funspec.AnyFunSpec
 import org.scalatest.matchers.should.Matchers
 import org.scalatestplus.junit.JUnitRunner
@@ -62,6 +65,7 @@ class JsonIoSpec
       .builder()
       .addModule(new Jdk8Module())
       .build()
+  val jf: JsonNodeFactory = JsonNodeFactory.instance
 
   describe("The class") {
 
@@ -133,52 +137,6 @@ class JsonIoSpec
   }
 
   describe("The class PublicKeyCredential") {
-    it(
-      "has an alternative parseRegistrationResponseJson function as an alias."
-    ) {
-      def test[A](tpe: TypeReference[A])(implicit a: Arbitrary[A]): Unit = {
-        forAll { value: A =>
-          val encoded: String = json.writeValueAsString(value)
-          val decoded: A = json.readValue(encoded, tpe)
-          val altDecoded =
-            PublicKeyCredential.parseRegistrationResponseJson(encoded)
-          val altRecoded: String = json.writeValueAsString(altDecoded)
-
-          altDecoded should equal(decoded)
-          altRecoded should equal(encoded)
-        }
-      }
-      test(
-        new TypeReference[PublicKeyCredential[
-          AuthenticatorAttestationResponse,
-          ClientRegistrationExtensionOutputs,
-        ]]() {}
-      )
-    }
-
-    it(
-      "has an alternative parseAuthenticationResponseJson function as an alias."
-    ) {
-      def test[A](tpe: TypeReference[A])(implicit a: Arbitrary[A]): Unit = {
-        forAll { value: A =>
-          val encoded: String = json.writeValueAsString(value)
-          val decoded: A = json.readValue(encoded, tpe)
-          val altDecoded =
-            PublicKeyCredential.parseAssertionResponseJson(encoded)
-          val altRecoded: String = json.writeValueAsString(altDecoded)
-
-          altDecoded should equal(decoded)
-          altRecoded should equal(encoded)
-        }
-      }
-      test(
-        new TypeReference[PublicKeyCredential[
-          AuthenticatorAssertionResponse,
-          ClientAssertionExtensionOutputs,
-        ]]() {}
-      )
-    }
-
     it("allows rawId to be present without id.") {
       def test[P <: PublicKeyCredential[_, _]](tpe: TypeReference[P])(implicit
           a: Arbitrary[P]
@@ -416,6 +374,92 @@ class JsonIoSpec
     }
   }
 
+  describe("The function PublicKeyCredential.parseRegistrationResponseJson") {
+    it("can parse registration responses.") {
+      def test[A](tpe: TypeReference[A])(implicit a: Arbitrary[A]): Unit = {
+        forAll { value: A =>
+          val encoded: String = json.writeValueAsString(value)
+          val decoded: A = json.readValue(encoded, tpe)
+          val altDecoded =
+            PublicKeyCredential.parseRegistrationResponseJson(encoded)
+          val altRecoded: String = json.writeValueAsString(altDecoded)
+
+          altDecoded should equal(decoded)
+          altRecoded should equal(encoded)
+        }
+      }
+
+      test(
+        new TypeReference[PublicKeyCredential[
+          AuthenticatorAttestationResponse,
+          ClientRegistrationExtensionOutputs,
+        ]]() {}
+      )
+    }
+
+    describe("""tolerates and ignores the "response" sub-attribute:""") {
+      def test[T <: JsonNode](attrName: String, genAttrValue: Gen[T]): Unit = {
+        type P = PublicKeyCredential[
+          AuthenticatorAttestationResponse,
+          ClientRegistrationExtensionOutputs,
+        ]
+        it(s"${attrName}.") {
+          forAll(
+            arbitrary[P],
+            genAttrValue,
+          ) { (value: P, attrValue: T) =>
+            val tree: ObjectNode = json.valueToTree(value)
+            tree
+              .get("response")
+              .asInstanceOf[ObjectNode]
+              .set(attrName, attrValue)
+            val encoded = json.writeValueAsString(tree)
+            val decoded =
+              PublicKeyCredential.parseRegistrationResponseJson(encoded)
+            val recoded: ObjectNode = json.valueToTree[ObjectNode](decoded)
+            recoded.has(attrName) should be(false)
+          }
+        }
+      }
+
+      test(
+        "publicKeyAlgorithm",
+        arbitraryCOSEAlgorithmIdentifier.arbitrary.map(i =>
+          jf.numberNode(i.getId)
+        ),
+      )
+
+      test(
+        "publicKey",
+        arbitrary[String].map(new TextNode(_)),
+      )
+    }
+  }
+
+  describe("The function PublicKeyCredential.parseAssertionResponseJson") {
+    it("can parse assertion responses.") {
+      def test[A](tpe: TypeReference[A])(implicit a: Arbitrary[A]): Unit = {
+        forAll { value: A =>
+          val encoded: String = json.writeValueAsString(value)
+          val decoded: A = json.readValue(encoded, tpe)
+          val altDecoded =
+            PublicKeyCredential.parseAssertionResponseJson(encoded)
+          val altRecoded: String = json.writeValueAsString(altDecoded)
+
+          altDecoded should equal(decoded)
+          altRecoded should equal(encoded)
+        }
+      }
+
+      test(
+        new TypeReference[PublicKeyCredential[
+          AuthenticatorAssertionResponse,
+          ClientAssertionExtensionOutputs,
+        ]]() {}
+      )
+    }
+  }
+
   describe("The class PublicKeyCredentialCreationOptions") {
     it("""has a toCredentialsCreateJson() method which returns a JSON object with the PublicKeyCredentialCreationOptions set as a top-level "publicKey" property.""") {
       forAll { pkcco: PublicKeyCredentialCreationOptions =>