Decreasing data transfer over a network may commence with collecting subscriber data. The method may continue with classifying the subscriber data into low frequency change data and high frequency change data based on predetermined criteria. The method may include storing the low frequency change data to a data storage. The method may continue with generating reporting data. The reporting data may include the high frequency change data and at least one data index pointer to the low frequency change data in the data storage. The method may further include providing the reporting data to a data processing node. The low frequency change data may include subscriber identifying data. The data reporting node may be further configured to obfuscate the subscriber identifying data. The at least one data index pointer may include a secure data identifier associated with the obfuscated subscriber identifying data.