Cookie name | Expires after | Description of cookie |
k | 1 week | Twitter image server cookie |
guest_id | 24 months | Identifies whether the visitor is a user or guest of Twitter |
original_referer | . | This cookie is used to supply the feed on this site. |
_utma | 12 months | This keeps track of the number of times a visitor has been to Twitter, when their first visit was, and when their last visit occurred |
_utmb | 30 minutes | A timestamp of the exact moment in time when a visitor enters the site |
_utmc | End of session | A timestamp of the exact moment in time when a visitor leaves the site - having waited 30 minutes for another pageview to happen, and if it doesn’t, it expires |
_utmz | 6 months | This keeps track of where the visitor came from, what search engine was used, what link was clicked on, what keywords used, and where in the world Twitter was accessed from |
_utmv | 2 years | Used for user-defined reports in Google Analytics classifying the visitor |
_twitter sess | End of session | Defines a unique ID associated with the current user linked to Twitter |
auth_token | End of session | On login |
auh_token_session | End of session | On login |
secure_session | End of session | On login |
twll | 10 years | On login |
lang | End of session | On login |
pid | 24 months | Used by Twitter (from the share buttons that are embedded in some of our pages) |
Cookie name | Expires after | Description of cookie |
datr | 24 months | This identifies the web browser being used to connect to Facebook independent of the logged in visitor. This cookie plays a key role in Facebook’s security and site integrity features |
reg_fb_gate | End of session | This contains the first Facebook page visited |
reg_fb_ref | End of session | This contains the last Facebook page visited |
wd | End of session | This identifies the browser window dimensions |
lsd | End of session | This contains a random value that is set when a Facebook user logs out in order to prevent cross-site request forgery attacks |
c_user | Set by visitor | This contains the user ID of the currently logged in visitor. The lifetime of this cookie is dependent on the status of the "keep me logged in" checkbox. If the checkbox is set, the cookie expires after 30 days of inactivity, otherwise the cookie is a session cookie and will therefore be cleared when the browser exits |
csm | End of session | This cookie is used to integrate the user's Facebook's Like status with the London 2012 site |
lu | 2 years | This is used to manage how the login page is presented to the visitor. The lifetime is the same as c_user |
s | End of session | |
locale | 1 week | This contains the display locale of the last logged in visitor on this browser. This is set after the visitor logs out |
sct | Set by visitor | This contains a timestamp representing the time at which the visitor logged in. This cookie is used to distinguish between multiple sessions created at different times. The lifetime is the same as c_user |
xs | Set by visitor | This contains the session number, a session secret and an optional "secure" flag (if visitor has enabled secure browsing feature). The lifetime is the same as c_user |