Systems and methods for managing tokens and filtering data to control data access

Systems and methods are described for receiving a byte stream from a data provider. Data elements of a data record included in the byte stream may be identified and transferred to buffer memory. A key-value map may be generated to map the identified data elements to their respective memory locations in the buffer memory. Based on a data directive associated with the data provider and using the key-value map, filtering of the data elements may be performed, and the filtered data elements may be provided to a data recipient.