A message sent to a consumer device (like a set-top box) that authorizes the device to decrypt a specific piece of protected content. The ECM contains the necessary control words and authorization details for access.
ECMs are typically used in conditional access systems in broadcast, satellite, cable, and IPTV services to secure content.
Verimatrix VCAS system sends ECMs to conditional access systems for the protection of premium content.
Does an ECM control access to content?
Yes.
