<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDgvMGZhYzNjN2EtMjRjNi00M2YyLWIwOGUtZTk5YjNhOWEyZWRhLmpwZw==.jpg"></p><p>The researchers based their ideas on “proof of personhood” technologies developed by the blockchain community.</p>