[Purpose/significance] Under the environment of Mobile Internet, service providers of APPs master an increasing amount of user data. Closing accounts has become an effective approach for users to prevent illegal use of individual information. The construction of account cancellation mechanism is of great significance to guarantee users' information security.[Method/process] Based on the systematic investigations on relevant laws and regulations of China, and the General Data Protection Regulation (GDPR) enacted by EU, we have achieved a comprehensive understanding of status and problems of account cancellation mechanisms in popular APPs at home and abroad, then we proposed feasible construction strategies corresponding to the problems.[Result/conclusion] This paper proposed a whole-flow cancellation mechanism of user accounts, which covers three stages of account closing (i.e. before, during and after the process), implemented jointly by service providers, regulators and users. Moreover, we pointed out the direction of breakthrough and innovation in terms of managing and servicing users' information security in the future.
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