{"id":2085,"date":"2021-05-24T19:06:40","date_gmt":"2021-05-24T17:06:40","guid":{"rendered":"https:\/\/www.trackingninja.de\/delete-personally-identifiable-information-pii-from-matomo\/"},"modified":"2021-07-12T22:05:12","modified_gmt":"2021-07-12T20:05:12","slug":"delete-personally-identifiable-information-pii-from-matomo","status":"publish","type":"post","link":"https:\/\/www.trackingninja.de\/en\/delete-personally-identifiable-information-pii-from-matomo\/","title":{"rendered":"Delete personally identifiable information (PII) from Matomo"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">For data protection reasons, the collection of personal data in a web tracking tool such as Matomo or Google Analytics is not permitted. To avoid the risk of being sued or fined, you should periodically check to see if personal information is being collected through tracking.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">If this is the case, you can delete this data from Matomo relatively easily.<br \/>\n<\/span><span style=\"font-weight: 400;\">How to do that, I explain in this post.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">The best way to remove PII is to not capture it in the first place.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">It is advisable to take care to mask IPs, not to enrich page titles and URL paths with personal data, or to store user data that allows unique identification of an individual via Custom Dimension.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">They have no place in events either.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Recognition of personal data (PII)<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">What is PII data and how do I find it?<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">In <\/span><strong><br \/>\n  <span style=\"text-decoration: underline;\"><br \/>\n    <a href=\"https:\/\/matomo.org\/blog\/2020\/01\/your-introduction-to-personally-identifiable-information-what-is-pii\/\">this article from Matomo<\/a><br \/>\n  <\/span><br \/>\n<\/strong><span style=\"font-weight: 400;\"> you will find a good explanation of what is defined as personal data and why it is relevant to know them.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">Google <\/span><span style=\"text-decoration: underline;\"><br \/>\n  <strong><br \/>\n    <a href=\"https:\/\/support.google.com\/analytics\/answer\/6366371#zippy=%2Cthemen-in-diesem-artikel\">also offers a guide<\/a><br \/>\n  <\/strong><br \/>\n<\/span><span style=\"font-weight: 400;\">  how to avoid sending personally identifiable information. Also, the post contains information on how you can avoid sending them.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Ergo:<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">It is possible to collect sensitive data with all common web tracking tools or server-side tracking and it is also possible to prevent it.<\/span><\/p>\n<h4><span style=\"font-weight: 400;\">User data can show up here:<\/span><\/h4>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">User ID<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Content settings (pages and page titles)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Event \/ Event Tracking  <\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">E-commerce settings (credit card, customer name, shipping and billing address, phone number)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Campaign dimensions (source, medium, campaign, ad content, concept fields)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Internal search (search term or category)<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Benutzerdefinierte Dimensionen \/ Custom Dimensions<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">The following screenshot contains exemplary PII data in the marked areas.<br \/>\n<span style=\"font-size: 15px;\">In the campaign parameters are user data and the page path contains an email address.<\/span><br \/>\n<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-scaled.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"wp-image-2068 size-full\" src=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-scaled.jpg\" alt=\"sensitive data matomo - deletion\" width=\"2560\" height=\"575\" srcset=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-scaled.jpg 2560w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-300x67.jpg 300w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-1024x230.jpg 1024w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-768x173.jpg 768w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/nutzerdaten-matomo-1536x345.jpg 1536w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<h4><\/h4>\n<h6><em>The picture shows data that I recorded for demo purposes.<\/em><\/h6>\n<h4><span style=\"font-weight: 400;\">Search specifically for PII<\/span><\/h4>\n<p><span style=\"font-weight: 400;\">With a weekly report you can get a targeted overview of found PII. One possibility is to send this automatically by email.<br \/>\n<\/span><span style=\"font-weight: 400;\">Custom reports are suitable for this purpose.<br \/>\n<\/span><span style=\"font-weight: 400;\">Of course, these reports should not return any results, but if they do, you can quickly take action and determine the cause, delete the records.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Deletion of PII in the DSGVO Tools from Matomo<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Matomo provides a process for removing PII. To do so, navigate to Admin &gt; Privacy &gt; GDPR Tools.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">There you can have your data searched specifically and identify critical data.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">The result is then listed and you have the option to delete these entries.<\/span><\/p>\n<p><a href=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-scaled.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"size-full wp-image-2070 alignleft\" src=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-scaled.jpg\" alt=\"matomo - gdpr tools - pii deletion\" width=\"2560\" height=\"1101\" srcset=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-scaled.jpg 2560w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-300x129.jpg 300w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-1024x440.jpg 1024w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-768x330.jpg 768w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-gdpr-tools-pii-deletion-1536x660.jpg 1536w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<p>&nbsp;<\/p>\n<p><a href=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-scaled.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-2078\" src=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-scaled.jpg\" alt=\"matomo - delete - selected users\" width=\"2560\" height=\"529\" srcset=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-scaled.jpg 2560w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-300x62.jpg 300w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-1024x212.jpg 1024w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-768x159.jpg 768w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-delete-selected-users-1536x318.jpg 1536w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<h3><span style=\"font-weight: 400;\">Determine the affected users with custom reports  <\/span><\/h3>\n<p><span style=\"font-weight: 400;\">You can use a custom report to quickly and easily check dimensions that need to be controlled. If you need help creating a report, I&#8217;d be happy to provide support and advice.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><i><span style=\"font-weight: 400;\">Note: If you create a custom report, it is recommended to create all entries with the &#8220;Invalidate reports&#8221; plugin.<\/span><\/i><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">In the following image you can see how to display the page URL and the corresponding visitor ID.<\/span><\/p>\n<p><a href=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-scaled.jpg\"><img decoding=\"async\" loading=\"lazy\" class=\"alignnone size-full wp-image-2072\" src=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-scaled.jpg\" alt=\"matomo - custom report - pii data\" width=\"2560\" height=\"674\" srcset=\"https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-scaled.jpg 2560w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-300x79.jpg 300w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-1024x270.jpg 1024w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-768x202.jpg 768w, https:\/\/www.trackingninja.de\/wp-content\/uploads\/2021\/05\/matomo-custom-report-pii-data-1536x405.jpg 1536w\" sizes=\"(max-width: 2560px) 100vw, 2560px\" \/><\/a><\/p>\n<p><span style=\"font-weight: 400;\">In the aforementioned GDPR tools, you can now search specifically for the Visitor ID and delete it. All data collected in connection with this ID will then be deleted.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">This also works with campaigns and custom dimensions.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">The deletion is immediate and cannot be reversed.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">Conclusion on deleting sensitive data in Matomo<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">You can remove entries relatively quickly and easily with Matomo. It is not necessary to do this through the database and SQL, it can be done directly through the backend.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\">From my perspective, it&#8217;s a good idea to take regular spot checks or use an automated report to look for PII.  <\/span><\/p>\n<h5><b><i>Notice:<\/i><\/b><b><i><br \/>\n<\/i><\/b><i><span style=\"font-weight: 400;\">To be able to perform all steps as described, Matomo should be on-premise \/ self-hosted.<\/span><\/i><i><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/i><i><span style=\"font-weight: 400;\">Since the cloud version does not offer the &#8220;Invalidate reports&#8221; or the customer support must be contacted for this.<\/span><\/i><i><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/i><i><span style=\"font-weight: 400;\">In addition, the following plugins are necessary.<\/span><\/i><i><\/i><\/h5>\n<p>&nbsp;<\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"text-decoration: underline;\"><a href=\"https:\/\/plugins.matomo.org\/CustomReports\"><i><span style=\"font-weight: 400;\">Custom Reports<\/span><\/i><\/a><\/span><\/li>\n<\/ul>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"text-decoration: underline;\"><a href=\"https:\/\/plugins.matomo.org\/InvalidateReports\"><i><span style=\"font-weight: 400;\">Invalidate Reports<\/span><\/i><\/a><\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>For data protection reasons, the collection of personal data in a web tracking tool such as Matomo or Google Analytics is not permitted. 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