---
title: cf.tls_client_random
description: The value of the 32-byte random value provided by the client in a [TLS handshake](https://www.cloudflare.com/learning/ssl/what-happens-in-a-tls-handshake), encoded in Base64.
image: https://developers.cloudflare.com/core-services-preview.png
---

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#  cf.tls\_client\_random 

`cf.tls_client_random` ` String ` 

The value of the 32-byte random value provided by the client in a [TLS handshake](https://www.cloudflare.com/learning/ssl/what-happens-in-a-tls-handshake), encoded in Base64.

For more details, refer to [RFC 8446](https://datatracker.ietf.org/doc/html/rfc8446#section-4.1.2).

Example value:

```
"YWJjZA=="
```

Categories: 
* Request
* SSL/TLS

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```