> For the complete documentation index, see [llms.txt](https://docs.umbcheckout.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.umbcheckout.net/v17/core-services/cookies.md).

# Cookies

The possible cookies which can be set are outlined below with their explanations

| Name                                            | Reason                                                                                                                                                  |
| ----------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------- |
| UmbCheckoutSession                              | The .NET Session Id (HttpOnly, essential)                                                                                                               |
| UmbCheckoutSession\_Basket{culture}\_{currency} | The encrypted [Basket](/v17/core-services/object-reference/basket.md) for one site root culture and currency, e.g. `UmbCheckoutSession_Basketen-GB_GBP` |

{% hint style="info" %}
The Basket cookie requires a paid license, and is only set when **Store Basket In a Cookie** is on. It is HttpOnly and Secure, and expires after the number of days set in the [configuration](/v17/configuration/configuration-options.md).
{% endhint %}

The Basket is encrypted with ASP.NET Core Data Protection. On a load-balanced site, share the Data Protection key ring between the servers, or a server that can't read a visitor's Basket cookie ignores it. A cookie that is corrupt is deleted; Basket cookies from UmbCheckout 1.x are split into one cookie per currency.


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