Twitter says it used security data for advertising

Oct 15, 2019898

The social networking site Twitter said this week that emails and mobile numbers sent by users to enable two-factor authentication were "inadvertently" used for advertising. According to the company, the data was not shared with third parties, but used to target ads made within the platform.


According to the firm, when advertisers upped the list of contacts they wanted to impact, their internal system combined user information with the complementary data the platform had.


The problem: Because the information was delivered for security reasons, this match should not happen.


"We can't say for sure how many people were impacted by this, but in an effort to be transparent, we want to leave all customers," the company said in a post on its official blog.

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