diff --git a/lib/jwk/key/base.js b/lib/jwk/key/base.js
index c950d7fabb..e1673a0b9c 100644
--- a/lib/jwk/key/base.js
+++ b/lib/jwk/key/base.js
@@ -28,8 +28,8 @@ class Key {
 
     Object.defineProperties(this, {
       [KEYOBJECT]: { value: isObject(keyObject) ? undefined : keyObject },
-      private: { value: keyObject.type === 'private', enumerable: keyObject.type === 'private' },
-      public: { value: keyObject.type === 'public', enumerable: keyObject.type === 'public' },
+      private: { value: keyObject.type === 'private' },
+      public: { value: keyObject.type === 'public' },
       alg: { value: alg, enumerable: alg !== undefined },
       use: { value: use, enumerable: use !== undefined },
       kid: {
@@ -57,11 +57,8 @@ class Key {
       members = this.constructor[PUBLIC_MEMBERS]
     }
 
-    const result = Object.entries(this).reduce((acc, [prop, value]) => {
-      if (members.has(prop)) {
-        acc[prop] = value
-      }
-
+    const result = [...members].reduce((acc, key) => {
+      acc[key] = this[key]
       return acc
     }, { kty: this.kty, kid: this.kid })
 
@@ -87,14 +84,14 @@ class Key {
             Object.entries(jwk)
               .filter(([key]) => props.has(key))
               .reduce((acc, [key, value]) => {
-                acc[key] = { value, enumerable: true, configurable: false }
+                acc[key] = { value, enumerable: this.constructor[PUBLIC_MEMBERS].has(key), configurable: false }
                 return acc
               }, {})
           )
 
           return this[component]
         },
-        enumerable: true,
+        enumerable: this.constructor[PUBLIC_MEMBERS].has(component),
         configurable: true
       }
       return acc
diff --git a/lib/jwk/key/oct.js b/lib/jwk/key/oct.js
index 026bd0df57..9c1bc22e1f 100644
--- a/lib/jwk/key/oct.js
+++ b/lib/jwk/key/oct.js
@@ -30,7 +30,7 @@ class OctKey extends Key {
         value: this[KEYOBJECT] ? this[KEYOBJECT].symmetricKeySize * 8 : undefined
       },
       k: {
-        enumerable: true,
+        enumerable: false,
         get () {
           if (this[KEYOBJECT]) {
             Object.defineProperty(this, 'k', {