Measurement uses no cookies and no identifier stored on the reader's device. The site counts, on its own side, impressions (the advertisement was rendered), viewable impressions (at least half of it visible for at least one second) and clicks. To count how many different readers saw an advertisement in a month, we store an irreversible code calculated from the IP address and the browser identification, using a secret key that changes every month. The key is deleted after the monthly report is produced; from then on the stored codes can no longer be linked to anything, and the raw events are deleted after 92 days. After the key is deleted, neither the address nor the person can be recovered from this data.
A click goes through the site's redirect, which adds the standard UTM parameters to the landing address (source: medcasereports.com, medium: display, campaign name, creative, page type, section and language version). The advertiser receives neither the address of the page the reader came from nor any data about the reader. The monthly report for the advertiser holds aggregate figures only: impressions, viewable impressions, the number of users, clicks, invalid clicks, CTR, served time and a screenshot of the unit.