| 翻訳と辞書 |
| Card sharing ： ウィキペディア英語版 |
Card sharing
Card sharing, also known as control word sharing, is a method of allowing multiple clients or digital television receivers to access a subscription television network with only one valid subscription card. This is achieved by electronically sharing a part of the legitimate conditional access smart card's output data, enabling all recipients to gain simultaneous access to scrambled DVB streams, held on the encrypted television network.
Typically, a legitimate smart card is attached to a host digital television receiver, which is equipped with software to share the decrypted 64-bit "control word" key over a computer network, such as the Internet. Once a client receives this key, they can decrypt the encrypted content as though they were using their own subscription card.
== Basic operation ==
The security of conditional access smartcard technology is limited by the security of the DVB standard in which it operates. The standard practice of a legitimate smart card is to decrypt an ECM (Entitlement Control Message), which then provides the control word, which allows the viewing of scrambled material.〔http://www.eurasip.org/Proceedings/Ext/IST05/papers/60.pdf〕 With card sharing, however, the smart card and its security features are bypassed; software intercepts the decrypted control word and allows the user to share it across a computer network.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Card sharing」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|