: These are used to decrypt Entitlement Management Messages (EMMs) . These messages are sent over-the-air to tell your receiver which channel packages you are allowed to watch.
: These are short-term decryption keys for the actual video stream. They rotate frequently—often several times per minute—to make it difficult for pirates to maintain unauthorized access. videoguard keys
: Utilizes a custom version of VideoGuard integrated directly into their set-top boxes. : These are used to decrypt Entitlement Management
VideoGuard is used by major global broadcasters to protect their revenue and content rights: videoguard keys