A 6805-based security system for broadcasting stock information

This research describes the design and implementation of secure stock information broadcasting systems using Motorola's 68HC05B6 single-chip microcontroller as the embedded security devices. In-band technology is used to transparently insert encrypted stock information into TV channel(s) and send to households. The implemented conditional-access system uses the Data Encryption Standard (DES) and triple-DES to provide high levels of communication security.