From the FAQ provided by InfoSecCompliance:
What triggers the security breach notice obligations under the Security Law?
In order for the breach notice requirements to be triggered under the Security Law two general events must occur (with some sub-requirements discussed further below). First, there must have been a “breach of the security of the system data” discovered by a data collector or notified to a data collector. Second, “personal information” must have actually been acquired by an unauthorized person, or was “reasonably believed to have been acquired” by an unauthorized person.
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