The Bank of Israel’s Information and Statistics Department gathers and manages files from a variety of sources, some of which contain itemized information. In order to enable freedom of information while also maintaining the confidentiality of the information, the Department builds anonymization procedures for the information files. This is a complex process, the aim of which is to prevent the identification or disclosure of sensitive or confidential information on individuals whose data appear in the files. This work outlines the process of anonymization of itemized data, defines the basic terms involved, presents accepted methods for assessing the risk of disclosure in the files, and samples the implementation of the process.