Author(s): Chen Jiankai

Abstract: With the rapid development of modern science and technology and the acceleration of digital transformation in society, the era of big data has brought convenience as well as new crimes, and information crimes have become the focus. With the convenience of digitalization, the collection, processing and use of personal information are extensive and in-depth, and information interaction and exposure increase, and criminals illegally use it to infringe on personal and national interests. In the data age, the category of citizens' personal information is huge and the connotation is expanding, and the criminal behavior is diversified, which is difficult for the traditional criminal law protection model to cope with. We should further classify citizens' personal information, coordinate the relationship between criminal law and pre-law, and try to bring new criminal acts into criminal law regulation in order to build a perfect protection system.

Keywords: big data, citizens' personal information, criminal law protection, hierarchical protection

Article Info: Received: 31 Aug 2025; Received in revised form: 30 Sep 2025; Accepted: 03 Oct 2025; Available online: 07 Oct 2025

DOI: 10.22161/ijels.105.50