Irdeto 1 refers to a Conditional Access System developed by a company called Irdeto, a subsidiary of media group Naspers. Irdeto provides both software and smart card-based Conditional Access Systems to protect Pay TV content from unauthorized viewing by non-subscribers. The company provides technology which supports CATV, Satellite broadcasts, Terrestrial, MMDS and Internet Protocol Television (IPTV) services. Irdeto has headquarters in Amsterdam and in Beijing.
Irdeto technology is used to tackle TV piracy around the globe. Irdeto 1 is the original encoding system offered by the company, and in 1999 it was compromised and considered unsafe for broadcasters to use for protection of their services. It was replaced with Irdeto 2 afterwards.