anonymization       
noun [ U ] (UK usually anonymisation) uk/əˌnɒn.ɪ.maɪˈzeɪ.ʃən/ us/əˌnɑː.nə.məˈzeɪ.ʃən/
 匿名化
the fact or process of removing any information that shows which particular person something, particularly something such as a record on or message from a computer, relates to
  These protections would require the destruction or anonymization of all communications data. 这些保护措施要求销毁或匿名化所有通信数据。 
 If making data public, use an anonymization process for privacy protection. 如果公开数据,请做匿名化处理以保护隐私。 
 - More examples
 - Anonymization of a single database may be pointless as someone could conceivably reconstruct personally identifiable data by linking records from multiple databases.
 - All major search engines need to adopt a high standard when it comes to anonymization.
 - Their anonymization method, removing the last set of numbers in an IP address, has been criticized as insufficient.
 - We have anonymisation systems in place to secure confidentiality.