Provided is a digital broadcasting conditional access system and method, including a digital broadcasting transmitter and a digital broadcasting receiver. The transmitter scrambles a broadcasting signal using a control key, generates broadcasting viewing restriction information and broadcasting viewing entitlement information, and transmits the scrambled broadcasting signal after incorporating the broadcasting viewing restriction information and broadcasting viewing entitlement information into the scrambled broadcasting signal. The receiver extracts the broadcasting viewing restriction information and the broadcasting viewing entitlement information included in the scrambled broadcasting signal to generate the control key, descrambles the broadcasting signal using the control key, and reproduces the descrambled broadcasting signal. Thus, the system and method can be provided for a digital broadcasting receiver including a smart card. Moreover, the digital broadcasting receiver can easily access to digital broadcasting using a Short Message Service (SMS) message and a smart card.