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Viaccess 1 is the name given to the first Viaccess system to be developed by the France Telecom subsidiary. Viaccess 1 actually refers to the Viaccess PC2.3 system and technically to two of its modifications, TPS-Crypt and ThalesCrypt. Viaccess 1 would be considered an ineffective Conditional Access System, as would Viaccess PC2.4 (sometimes referred to Viaccess 2). Viaccess PC2.5 (also referred to as Viaccess 2) is still fully secure, as are its successors Viaccess PC2.6 (Viaccess 3) and Viacess PC3.0, the latest of the systems.