Social media giant Meta has launched a legal salvo against the Data Protection Commission (DPC), understood to be an appeal of the regulator’s decision to fine the company €91 million over its handling of users’ passwords. The watchdog launched the inquiry in April 2019, after Meta Platforms Ireland Limited (MPIL) notified the DPC that it had inadvertently stored certain user passwords in plaintext on its internal systems — without cryptographic protection or encryption. Because Meta is headquartered in Ireland, the DPC acted as the lead supervisory authority in the investigation into whether the lapse breached the General Data Protection Regulation…