diff --git a/packages/decode/src/decode.ts b/packages/decode/src/decode.ts
index fa73929d..d339cd89 100644
--- a/packages/decode/src/decode.ts
+++ b/packages/decode/src/decode.ts
@@ -144,7 +144,7 @@ export const getClaimsSync = <T>(
   return unpackedObj as T;
 };
 
-export const unpackArray = (
+const unpackArray = (
   arr: Array<unknown>,
   map: Record<string, Disclosure>,
   prefix = '',
@@ -160,21 +160,15 @@ export const unpackArray = (
           const presentKey = prefix ? `${prefix}.${idx}` : `${idx}`;
           keys[presentKey] = hash;
 
-          const { unpackedObj, disclosureKeymap: disclosureKeys } = unpackObj(
-            disclosed.value,
-            map,
-            presentKey,
-          );
+          const { unpackedObj, disclosureKeymap: disclosureKeys } =
+            unpackObjInternal(disclosed.value, map, presentKey);
           unpackedArray.push(unpackedObj);
           Object.assign(keys, disclosureKeys);
         }
       } else {
         const newKey = prefix ? `${prefix}.${idx}` : `${idx}`;
-        const { unpackedObj, disclosureKeymap: disclosureKeys } = unpackObj(
-          item,
-          map,
-          newKey,
-        );
+        const { unpackedObj, disclosureKeymap: disclosureKeys } =
+          unpackObjInternal(item, map, newKey);
         unpackedArray.push(unpackedObj);
         Object.assign(keys, disclosureKeys);
       }
@@ -185,7 +179,12 @@ export const unpackArray = (
   return { unpackedObj: unpackedArray, disclosureKeymap: keys };
 };
 
-export const unpackObj = (
+export const unpackObj = (obj: unknown, map: Record<string, Disclosure>) => {
+  const copiedObj = JSON.parse(JSON.stringify(obj));
+  return unpackObjInternal(copiedObj, map);
+};
+
+const unpackObjInternal = (
   obj: unknown,
   map: Record<string, Disclosure>,
   prefix = '',
@@ -203,11 +202,8 @@ export const unpackObj = (
         typeof (obj as Record<string, unknown>)[key] === 'object'
       ) {
         const newKey = prefix ? `${prefix}.${key}` : key;
-        const { unpackedObj, disclosureKeymap: disclosureKeys } = unpackObj(
-          (obj as Record<string, unknown>)[key],
-          map,
-          newKey,
-        );
+        const { unpackedObj, disclosureKeymap: disclosureKeys } =
+          unpackObjInternal((obj as Record<string, unknown>)[key], map, newKey);
         (obj as Record<string, unknown>)[key] = unpackedObj;
         Object.assign(keys, disclosureKeys);
       }
@@ -226,11 +222,8 @@ export const unpackObj = (
             : disclosed.key;
           keys[presentKey] = hash;
 
-          const { unpackedObj, disclosureKeymap: disclosureKeys } = unpackObj(
-            disclosed.value,
-            map,
-            presentKey,
-          );
+          const { unpackedObj, disclosureKeymap: disclosureKeys } =
+            unpackObjInternal(disclosed.value, map, presentKey);
           claims[disclosed.key] = unpackedObj;
           Object.assign(keys, disclosureKeys);
         }
@@ -281,7 +274,8 @@ export const getSDAlgAndPayload = (SdJwtPayload: Record<string, unknown>) => {
 };
 
 // Match the digests of the disclosures with the claims and extract the claims
-// unpack function use unpackObj and unpackArray to recursively unpack the claims
+// unpack function use unpackObjInternal and unpackArray to recursively unpack the claims
+// Since getSDAlgAndPayload create new object So we don't need to clone it again
 export const unpack = async (
   SdJwtPayload: Record<string, unknown>,
   disclosures: Array<Disclosure>,
diff --git a/packages/decode/src/test/decode.spec.ts b/packages/decode/src/test/decode.spec.ts
index 7d35a6f0..a4a07385 100644
--- a/packages/decode/src/test/decode.spec.ts
+++ b/packages/decode/src/test/decode.spec.ts
@@ -1,5 +1,6 @@
 import { describe, expect, test } from 'vitest';
 import {
+  createHashMapping,
   decodeJwt,
   decodeSdJwt,
   decodeSdJwtSync,
@@ -7,6 +8,7 @@ import {
   getClaimsSync,
   getSDAlgAndPayload,
   splitSdJwt,
+  unpackObj,
 } from '../index';
 import { digest } from '@sd-jwt/crypto-nodejs';
 
@@ -93,6 +95,26 @@ describe('decode tests', () => {
     expect(decodedSdJwt.jwt).toBeDefined();
   });
 
+  test('decode sdjwt sync (with KB)', () => {
+    const sdjwt =
+      'eyJ0eXAiOiJzZCtqd3QiLCJhbGciOiJFUzI1NiJ9.eyJpZCI6IjEyMzQiLCJfc2QiOlsiYkRUUnZtNS1Zbi1IRzdjcXBWUjVPVlJJWHNTYUJrNTdKZ2lPcV9qMVZJNCIsImV0M1VmUnlsd1ZyZlhkUEt6Zzc5aGNqRDFJdHpvUTlvQm9YUkd0TW9zRmsiLCJ6V2ZaTlMxOUF0YlJTVGJvN3NKUm4wQlpRdldSZGNob0M3VVphYkZyalk4Il0sIl9zZF9hbGciOiJzaGEtMjU2In0.n27NCtnuwytlBYtUNjgkesDP_7gN7bhaLhWNL4SWT6MaHsOjZ2ZMp987GgQRL6ZkLbJ7Cd3hlePHS84GBXPuvg~WyI1ZWI4Yzg2MjM0MDJjZjJlIiwiZmlyc3RuYW1lIiwiSm9obiJd~WyJjNWMzMWY2ZWYzNTg4MWJjIiwibGFzdG5hbWUiLCJEb2UiXQ~WyJmYTlkYTUzZWJjOTk3OThlIiwic3NuIiwiMTIzLTQ1LTY3ODkiXQ~eyJ0eXAiOiJrYitqd3QiLCJhbGciOiJFUzI1NiJ9.eyJpYXQiOjE3MTAwNjk3MjIsImF1ZCI6ImRpZDpleGFtcGxlOjEyMyIsIm5vbmNlIjoiazh2ZGYwbmQ2Iiwic2RfaGFzaCI6Il8tTmJWSzNmczl3VzNHaDNOUktSNEt1NmZDMUwzN0R2MFFfalBXd0ppRkUifQ.pqw2OB5IA5ya9Mxf60hE3nr2gsJEIoIlnuCa4qIisijHbwg3WzTDFmW2SuNvK_ORN0WU6RoGbJx5uYZh8k4EbA';
+    const decodedSdJwt = decodeSdJwtSync(sdjwt, digest);
+    expect(decodedSdJwt).toBeDefined();
+    expect(decodedSdJwt.kbJwt).toBeDefined();
+    expect(decodedSdJwt.disclosures.length).toEqual(3);
+    expect(decodedSdJwt.jwt).toBeDefined();
+  });
+
+  test('decode sdjwt (with KB)', async () => {
+    const sdjwt =
+      'eyJ0eXAiOiJzZCtqd3QiLCJhbGciOiJFUzI1NiJ9.eyJpZCI6IjEyMzQiLCJfc2QiOlsiYkRUUnZtNS1Zbi1IRzdjcXBWUjVPVlJJWHNTYUJrNTdKZ2lPcV9qMVZJNCIsImV0M1VmUnlsd1ZyZlhkUEt6Zzc5aGNqRDFJdHpvUTlvQm9YUkd0TW9zRmsiLCJ6V2ZaTlMxOUF0YlJTVGJvN3NKUm4wQlpRdldSZGNob0M3VVphYkZyalk4Il0sIl9zZF9hbGciOiJzaGEtMjU2In0.n27NCtnuwytlBYtUNjgkesDP_7gN7bhaLhWNL4SWT6MaHsOjZ2ZMp987GgQRL6ZkLbJ7Cd3hlePHS84GBXPuvg~WyI1ZWI4Yzg2MjM0MDJjZjJlIiwiZmlyc3RuYW1lIiwiSm9obiJd~WyJjNWMzMWY2ZWYzNTg4MWJjIiwibGFzdG5hbWUiLCJEb2UiXQ~WyJmYTlkYTUzZWJjOTk3OThlIiwic3NuIiwiMTIzLTQ1LTY3ODkiXQ~eyJ0eXAiOiJrYitqd3QiLCJhbGciOiJFUzI1NiJ9.eyJpYXQiOjE3MTAwNjk3MjIsImF1ZCI6ImRpZDpleGFtcGxlOjEyMyIsIm5vbmNlIjoiazh2ZGYwbmQ2Iiwic2RfaGFzaCI6Il8tTmJWSzNmczl3VzNHaDNOUktSNEt1NmZDMUwzN0R2MFFfalBXd0ppRkUifQ.pqw2OB5IA5ya9Mxf60hE3nr2gsJEIoIlnuCa4qIisijHbwg3WzTDFmW2SuNvK_ORN0WU6RoGbJx5uYZh8k4EbA';
+    const decodedSdJwt = await decodeSdJwt(sdjwt, digest);
+    expect(decodedSdJwt).toBeDefined();
+    expect(decodedSdJwt.kbJwt).toBeDefined();
+    expect(decodedSdJwt.disclosures.length).toEqual(3);
+    expect(decodedSdJwt.jwt).toBeDefined();
+  });
+
   test('get claims', async () => {
     const sdjwt =
       'eyJ0eXAiOiJzZC1qd3QiLCJhbGciOiJFZERTQSJ9.eyJfc2QiOlsiaWQ1azZ1ZVplVTY4bExaMlU2YjJJbF9QR3ZKb1RDMlpkMkpwY0RwMzFIWSJdLCJfc2RfYWxnIjoic2hhLTI1NiJ9.GiLF_HhacrstqCJ223VvWOoJJWU8qk4dYQHklSMwxv36pPF_7ER53Wbty1qYRlQ6NeMUdBRRdj9JQLLCzz1gCQ~WyI2NTMxNDA2ZmVhZmU0YjBmIiwiZm9vIiwiYmFyIl0~';
@@ -161,4 +183,20 @@ describe('decode tests', () => {
     const { _sd_alg, payload } = getSDAlgAndPayload({});
     expect(_sd_alg).toBe('sha-256');
   });
+
+  test('unpackObj clone', async () => {
+    const sdjwt =
+      'eyJ0eXAiOiJzZC1qd3QiLCJhbGciOiJFZERTQSJ9.eyJ0ZXN0Ijp7Il9zZCI6WyJqVEszMHNleDZhYV9kUk1KSWZDR056Q0FwbVB5MzRRNjNBa3QzS3hhSktzIl19LCJfc2QiOlsiME9nMi1ReG95eW1UOGNnVzZZUjVSSFpQLUJuR2tHUi1NM2otLV92RWlzSSIsIkcwZ3lHNnExVFMyUlQxMkZ3X2RRRDVVcjlZc1AwZlVWOXVtQWdGMC1jQ1EiXSwiX3NkX2FsZyI6InNoYS0yNTYifQ.ggEyE4SeDO2Hu3tol3VLmi7NQj56yKzKQDaafocgkLrUBdivghohtzrfcbrMN7CRufJ_Cnh0EL54kymXLGTdDQ~WyIwNGU0MjAzOWU4ZWFiOWRjIiwiYSIsIjEiXQ~WyIwOGE1Yjc5MjMyYjAzYzBhIiwiMSJd~WyJiNWE2YjUzZGQwYTFmMGIwIiwienp6IiwieHh4Il0~WyIxYzdmOTE4ZTE0MjA2NzZiIiwiZm9vIiwiYmFyIl0~WyJmZjYxYzQ5ZGU2NjFiYzMxIiwiYXJyIixbeyIuLi4iOiJTSG96VW5KNUpkd0ZtTjVCbXB5dXZCWGZfZWRjckVvcExPYThTVlBFUmg0In0sIjIiLHsiX3NkIjpbIkpuODNhZkp0OGx4NG1FMzZpRkZyS2U2R2VnN0dlVUQ4Z3UwdVo3NnRZcW8iXX1dXQ~';
+    const decodedSdJwt = await decodeSdJwt(sdjwt, digest);
+    const jwtPayload = JSON.parse(JSON.stringify(decodedSdJwt.jwt.payload));
+
+    const { _sd_alg, payload } = getSDAlgAndPayload(decodedSdJwt.jwt.payload);
+    const hash = { hasher: digest, alg: _sd_alg };
+    const map = await createHashMapping(decodedSdJwt.disclosures, hash);
+
+    const { unpackedObj } = unpackObj(decodedSdJwt.jwt.payload, map);
+
+    expect(unpackedObj).toBeDefined();
+    expect(jwtPayload).toStrictEqual(decodedSdJwt.jwt.payload);
+  });
 });