# Verify Deauthorization event - signature issue

**URL:** <https://devforum.zoom.us/t/verify-deauthorization-event-signature-issue/78943>\
**Category:** API and Webhooks\
**Created:** [November 17, 2022, 1:19pm UTC](https://devforum.zoom.us/t/verify-deauthorization-event-signature-issue/78943 "2022-11-17T13:19:39Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Olegs](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/olegs/32/40652_2.png) [@Olegs](https://devforum.zoom.us/u/Olegs)\
**Post date:** [November 17, 2022, 1:19pm UTC](https://devforum.zoom.us/t/verify-deauthorization-event-signature-issue/78943/1 "2022-11-17T13:19:39Z")

</div>

I’m trying to verificate Deauthorization webhook event using this documentation: [Using webhooks](https://marketplace.zoom.us/docs/api-reference/webhook-reference/#verify-webhook-events)

Issue is I can’t get same signature as **X-Zm-Signature** after I hash my string with **X-Zm-Request-Timestamp** and payload. Is it wrong something with my code?

**X-Zm-Signature** : v0=db1a9e8bc25ad3c00a462ef3caa77cff82c06df0bbfe7155d28c9091a98e414b  
**My signature** : v0=KtHmQxjf93V74thor/9eZzRk/kzHAditgfiNcjONrq0=

**My signature before hash** : v0:1668690785:{“event”:“app\_deauthorized”,“payload”:{“account\_id”:“S543Bgs0Rb2y3vDugXTYeA”,“user\_id”:“vbI4BqUoRguZzNvJGJHfgw”,“signature”:“92b0befcce9309fd88b39b5c52a9ee3f3e6257fa42c65f556f44698bf163b66f”,“deauthorization\_time”:“2022-11-17T13:13:05.107Z”,“client\_id”:“y2t3CDe2T5Kj\_7evg8RI3g”},“event\_ts”:1668690785107}

For hashing I used secret token OlyNRtX8SHKnFjVTaK\_enQ

**Signature building** :

 ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/3/b/3b152feab95beb28f3afceddd24ea70b32a2d571.png)

**Hash method** :  
 ![image](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/c/8/c806e604f6cbaf5d0c6a7be640c417d7d27b5c93.png)

---

<div class="post-metadata">

**Author:** ![elisa.zoom](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/elisa.zoom/32/47836_2.png) [@elisa.zoom](https://devforum.zoom.us/u/elisa.zoom)\
**Post date:** [December 30, 2022, 5:34pm UTC](https://devforum.zoom.us/t/verify-deauthorization-event-signature-issue/78943/2 "2022-12-30T17:34:34Z")

</div>

Hi @Olegs  
Hope you are doing fine!  
Are you still having this issue or do you still need help with this?  
Best,  
Elisa

---

<div class="post-metadata">

**Author:** ![Olegs](https://sea2.discourse-cdn.com/flex016/user_avatar/devforum.zoom.us/olegs/32/40652_2.png) [@Olegs](https://devforum.zoom.us/u/Olegs)\
**Post date:** [January 2, 2023, 7:02am UTC](https://devforum.zoom.us/t/verify-deauthorization-event-signature-issue/78943/3 "2023-01-02T07:02:25Z")

</div>

Issue was resolved, thanks

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/flex016/uploads/zoomdeveloper/original/3X/6/1/614bdd549b610bbaa46ff934617683a02bdaa03c.png) [@system](https://devforum.zoom.us/u/system)\
**Post date:** [January 5, 2024, 10:39pm UTC](https://devforum.zoom.us/t/verify-deauthorization-event-signature-issue/78943/4 "2024-01-05T22:39:24Z")

</div>

Closed on January 5, 2024, 10:39pm UTC

This topic was automatically closed 368 days after the last reply. New replies are no longer allowed.