io.github.javiercanillas:jackson-masker (maven):  Sensitive information (such us emails, IDs or phone numbers) is a serious problem to deal with. If you have objects that are logged or write into files where masking is required, and you are already using Jackson ObjectMapper solution in your application, this library might be of some help. 
Keywords: jackson-objectmapper|sensitive|sensitive-data-exposure|sensitive-data-security