Buchodi is the public name of a researcher who investigates how mobile applications and advertising systems collect and transfer data. Their blog publishes technical accounts of observed tracking behavior and offers related consulting work.[1]
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In the OpenAI ad-collector investigation, Buchodi describes reproducing an identifier-synchronization flow on a phone using two capture methods. The report traces a signed token, a cookie and advertiser-side event requests to explain how browsing activity could be linked across contexts. It includes redacted payloads and separates several sources of collected fields. These are the author’s observations of the tested implementation and traffic, not a claim that every website or every user follows the same path.[2]
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A technical traffic analysis of identifier synchronization and advertiser-side data collection, with redacted request evidence.
Read the step-by-step flow alongside the redacted requests. Familiarity with cookies, HTTP and signed tokens helps; distinguish the recorded behavior from conclusions about all browsing or all users.
Author and investigator[2]Original source