Viaccess [SEP] country of origin
has proved difficult, if not impossible, to implement on many satellite receivers, rendering the TPS Crypt AES system a general success.
The second Viaccess modification, called ThalesCrypt, is used by Canal Satellite France to protect its contents on the transport network to the head-ends of the cable networks; it is an over-encryption mechanism of the original protocol encryption keys. 
Viaccess is currently used by a large number of providers. These include:
- Some programs
- ART
- NTV
- Televisa
Viaccess
Viaccess is a conditional access system developed by Orange S.A.. There are six versions in use today, Viaccess PC2.3, Viaccess PC2.4, Viaccess PC2.5, Viaccess PC2.6, Viaccess PC3.0, Viaccess PC4.0, Viaccess PC5.0, and Viaccess PC6.0.
Viaccess was developed as the digital version of the EuroCrypt system used with the hybrid MAC system,
The first version is sometimes referred to as Viaccess 1, and the latter three, although different, as Viaccess 2. PC2.3 and PC2.4 are known to be ineffective, and many