On December 15, 2022, Thailand’s Personal Data Protection Committee (PDPC) issued the Notification on the Criteria and Procedures for Handling Personal Data Breaches. What Constitutes a “Data Breach”? A “personal data breach” refers to a breach of security measures that causes unlawful or unauthorized loss, access, use, modification, or disclosure of personal data, resulting from an intentional, willful, negligent, accidental, unauthorized, or unlawful act, or an act related to computer crimes, cyber threats, mistakes or accidents, or any other act. The notification also classifies personal data breaches into three categories: confidentiality breach, integrity breach, and availability breach. Upon being informed of an actual or suspected personal data breach, a data controller must take the following actions: To the extent possible, assess the reliability of the information and investigate the facts related to the personal data breach, including all aspects concerning security measures, such as organizational measures, technical measures, and physical measures; Conduct a data breach assessment to consider whether the personal data breach is likely to result in a risk to an individual’s rights and freedom; Notify the Office of the PDPC, any affected data subjects, or both as required; and Take necessary and appropriate action to prevent further consequences resulting from the personal data breach. Breach Assessment When conducting a data breach assessment, the following factors must be taken into account if there is a risk to an individual’s rights and freedom. Nature and the type of data breach; Nature, type, and volume of personal data involved; Nature, type, and status of the affected data subject; Severity of the consequences of the personal data breach for any affected data subjects, and the effectiveness of the measures taken to prevent the data breach; Impact of the data breach on the operation of the business or on the public; Storage