What is the purpose of a Ci slot on a TV?

CI Information ci slot A CI slot is a slot in TV devices that allows a separate smart card to be inserted for access to encrypted content circus delight slot demo Conax decoding module CI module for receivers with common interface for decryption of encoded data

ci slot tv 8 channel with CI slots DVB-S2 IRD is multichannel Professional Integrated Receiver and Descrambler designed for high-quality TV broadcasting