Although the real name for the coding system is Mediaguard, it is often referred to as Seca or Aston Seca. Mediaguard is developed by Seca, so the also used name Seca Mediaguard is more suitable. Aston is a company that builds the CAM’s (among others) that are used to decode the Mediaguard system.

The Seca Mediaguard coding is used by the Canal + organization which is no wonder. Canal + is a shareholder in the Seca organization and it also takes part in the development of the Mediaguard coding system. Because of the influence of Canal +, the Seca Mediaguard system is very popular in France.