Viamedis, which manages third-party payment for 84 supplementary health insurance companies, or 20 million social security policyholders, announced on Thursday that it had been the victim of a cyberattack. “The personal data exposed is limited and is as follows: marital status, date of birth and social security number, name of their health insurer and guarantees open to third- party payers” “Neither banking information, nor postal details, nor telephone number, nor email are affected by this malicious act,” the company indicated.