Mankind has entered the information age for many years but has not found a way to adequately protect data, so the risk of data leakage has become a global problem. According to a survey, 68% of companies claim to have experienced a data breach. The direct economic costs caused by large-scale data breaches are at the level of hundreds of million yuan. In addition to them, there
are many “hidden costs” too, including damage to goodwill, customer churn, etc. Widespread recognition of the importance of privacy and data protraction is increasing as more social and economic activities are conducted online. According to a United Nation report, as of April 2020, 128 out of 194 countries or 66%, have enacted legislation to ensure the protection of data and privacy.
