Modern pay-TV encryption (like Irdeto, Nagravision, or VideoGuard) changes the decryption keys frequently (sometimes every few seconds). It is impossible to manually enter these keys because they change too fast. In this illegal context, the "Softcam Key" often refers to connection credentials (like C-lines or N-lines ). These keys do not decrypt the channel directly; instead, they connect the user's receiver to a server (often called a Card Sharing Server) that has a legitimate smartcard. The receiver asks the server for the decryption code for that split second, and the server sends it back via the internet.
: The broadcaster sends an encrypted signal along with an "ECM" (Entitlement Control Message). Softcam Key