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DC Storm Cookies

Non-cross domain tracking: 1st party Cookies

Non-cross domain tracking uses first party cookie only. These cookies are written in the domain of the site being tracked.

Cookie Name

Description

Expiry

_#srchist

Stores the history of traffic sources the user has arrived to the site by

1000 days

_#sess

Stores information about the session

1000 days

_#vdf

Stores the visit definition – ts type, number of visits, expiry

1000 days

_#uid

Stores a user identifier (only within a site)

1000 days

_#slid

Unique sale ID

1000 days

_#clkid

Unique identifier for a click generating a landing

1 year

_#lps

Flags that the last page was secure and therefore has no referrer

20 min

_#tsa

Stores the referrer details to avoid duplicate Landing events

10 min

_#env

Flags whether the environment variables (screen size, browser etc) need to be collected again

30 days

Cross domain tracking: 3rd party Cookie

Cross domain tracking uses 3rd party cookies to enable spanning of domains. The availability of third party cookies is tested – if not available a 1st party cookie is used instead, with reduced tracking ability.

Cookie Name

Description

Expiry

stc[site id]

This is the third party cookie used to store all the other cookie data in concatenated form. The Cookie’s name has the site ID in it.

1000 days

_#nxd

This is a 1st party cookie used when access to the third party cookie is blocked. It stores the data similarly to the _#stc cookie.

1000 days

_#lps

Indicates whether or not the last page was secure (HTTPS) and we use this to help determine traffic sources as the Referrer is always empty on a page browsed immediately after a Secure Page

20 Minutes

_#tsa

Helps to identify and remove duplicate traffic sources

10 Minutes

Please be mindful that you might also need to provide details of the use of certain other cookies called by tags within the Storm Container Tag.

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