Access control, the same principle applied outside of television.
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This being apparently not sufficient to prevent unauthorized viewing, TPS has lowered this interval down to about 12 minutes.
The Dbox2 has grown in popularity among home hobbyists due to the ability to use softcams to enable it to decrypt channels without the need for the physical access card to be present in the box, or with the use of a pirated key, without any card at all.
Public-access television | Access Hollywood | Access Industries | Controlled-access highway | Internet Message Access Protocol | NFL Total Access | Lightweight Directory Access Protocol | Public, educational, and government access | open access | Microsoft Access | Access | Time division multiple access | Space-division multiple access | Random-access memory | Limited-access road | Wireless access point | Open access (publishing) | open access journal | Direct memory access | Advanced Access Content System | Random Access Memories | Open access journal | Microsoft Data Access Components | Marine and Coastal Access Act 2009 | High Speed Packet Access | Government-access television | Access course | Access control list | The Access Group | "Space-Division Multiple Access" |
B-CAS (BS Conditional Access Systems Co., Ltd.) is a vendor and operator of the ISDB CAS system in Japan.