iTWire Wednesday, 05 May 2021 11:21 Signal chief highlights how Facebook uses personal data to target ads Featured Hardly a month after he exposed the poor security in software deployed by Israeli mobile surveillance firm Cellebrite, Signal creator Moxie Marlinspike has taken a potshot at Facebook's practices of collecting personal data. In a blog post, Marlinspike, whose real name is Matthew Rosenfeld, said he had taken an Instagram ad account in order to show the degree of visibility that companies like Facebook had into users' lives. "[Companies like Facebook] collect everything they can from FB, Instagram, and WhatsApp in order to sell visibility into people and their lives," Marlinspike said.