Final answer:
CableCARD is a signal security device used by cable operators in STBs to authorize viewing of subscribed services.
Explanation:
CableCARD is the signal security device developed for STBs (Set-Top Boxes) that broadband cable operators use to authorize the viewing of subscribed cable services. CableCARDs are inserted into compatible STBs to decrypt the digital cable signal, allowing users to access their subscribed content.
These devices contain security features to prevent unauthorized access to cable content, ensuring that only paying subscribers can view the channels they have subscribed to. By using CableCARDs, cable operators can securely provide their services to customers who use STBs compatible with this technology.
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