Cookies are used by this WordPress(R) installation to track users and hits to the individual pages. The tracking and aggregating is done by a third party (WordPress.com by means of the Jetpack plug-in). There is no transfer of these cookies’ information content to other third parties.
Here is a guide on how to delete cookies: http://www.wikihow.com/Clear-Your-Browser%27s-Cookies
And finally for the GDPR directive (DSGVO in Germany)
Using WordPress, the technology behind this website – I deactivated a lot of features, since I don’t care about tracking visitors and I don’t serve advertisement. But if you want to know more see below what’s going on, by using my website. If you contact me, your email address will land in my mail account (which is microsoftonline) and I’ll have it there forever (about 10 years).
Mit WordPress unterwegs (die Technologie des Websites) – Ich habe viele Merkmale deaktiviert, weil ich keine Werbung liefern will und weil ich Besucher nicht analysieren will. Aber wenn Sie mehr wissen wollen, was beim Besuch meines Websites passiert, schauen Sie unten. Wenn Sie mich kontaktieren bleibt Ihre Emailadresse in meinem Emailkonto (bei microsoftonline) für immer (ungefähr 10 Jahre).
Data Used:To deliver this functionality and record activities around site management, the following information is captured: user email address, user role, user login, user display name, WordPress.com and local user IDs, the activity to be recorded, the WordPress.com-connected site ID of the site on which the activity takes place, the site’s Jetpack version, and the timestamp of the activity. Some activities may also include the actor’s IP address (login attempts, for example) and user agent. To track image viewing following are stored: IP address, WordPress.com user ID (if logged in), WordPress.com username (if logged in), user agent, visiting URL, referring URL, timestamp of event, browser language, country code. To use the Gravatar images a hash of the user’s email address is sent(if logged in to the site or WordPress.com — or if they submitted a comment on the site using their email address that is attached to an active Gravatar profile) to the Gravatar service (also owned by Automattic) in order to retrieve their profile image. If the user clicks on Like (post-like action), the following information is used: IP address, WordPress.com user ID, WordPress.com username, WordPress.com-connected site ID (on which the post was liked), post ID (of the post that was liked), user agent, timestamp of event, browser language, country code. For the protection of the website, in order to check login activity and potentially block fraudulent attempts, the following information is used: attempting user’s IP address, attempting user’s email address/username (i.e. according to the value they were attempting to use during the login process), and all IP-related HTTP headers attached to the attempting user.
Activity Tracked:Login attempts/actions, post and page update and publish actions, comment/pingback submission and management actions, plugin and theme management actions, widget updates, user management actions, and the modification of other various site settings and options. Failed login attempts are tracked(these include IP address and user agent). There is a cookie (jpp_math_pass) lasting for 1 day to remember if/when a user has successfully completed a math captcha to prove that they’re a real human.