# FAQ

## Where can I find the iAdvize public key?

* Please see [here](https://app.gitbook.com/o/JZY4lQs3jDfTFvrnCKnh/s/C3dwvuSeenw12Wd9Vfpf/~/changes/147/technologies/authenticated-messaging/web-backend-implementation/signature-and-encryption-detailed-process#iadvize-public-key-use-for-production).

## **My visitor is authenticated (a JWT is in the local storage) but I don’t have a padlock 🔒 on the desk of the agent** <a href="#id-01h821774ppnndj66er389rtmv" id="id-01h821774ppnndj66er389rtmv"></a>

* Be sure, when you are in an authenticated space of your website where the visitor authentication is enabled, to remove the usage of the \`extId\` system: [About the External ID usage (extId)](https://help.iadvize.com/hc/en-gb/articles/6047518326290-iAdvize-Authenticated-Messaging-web-backend-implementation#h_01GHGEWCPJR1RT7NQBW3DPCGJX)

## JWT not valid

* Ensure you set all the required claims with the right prefixes

```
{
	"https://iadvize.com/userId":"myuserid",
	"iss":"https://livechat.iadvize.com",
	"exp":1602060589
}
```

* Ensure the JWT is signed with the right algorithm

```
{
	"alg": "RS256"
}
```

* Ensure the JWE is encrypted with the right algorithm

```
{
	"enc": "A256GCM",
	"alg": "RSA-OAEP-256"
}
```

* Ensure you use the right private key and the right iAdvize public key. Ensure iAdvize set up your public key in your settings


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