Sony DHG-HDD250 情報ガイド

 

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DFAST is the acronym for Dynamic Feedback Arrangement Scrambling Technique.  
DFAST is the system that enables a DCR product (also called the Host device) to 
communicate securely with a CableCARD™. Through this communication, the 
CableCARD™ is able to send all authorized services to the Host device.  For services 
that carry copy protection restrictions, the CableCARD™ activates DFAST encryption to 
protect the content when it is passed to the Host device. 
 
The manufacturer of the DCR product obtains the right to use the DFAST technology 
from CableLabs through a license agreement (either the DFAST License Agreement or 
the POD-Host Interface License Agreement, “PHILA”).  The license for the DFAST 
technology requires that DCR products be produced with limited vulnerability to 
tampering and with a certain degree of robustness. 

 
As a part of the regulations for DCR, the FCC has permitted programmers to activate 
copy protection of some digital content; the DFAST and PHILA license agreements 
require DCR products to respond to copy protection directives distributed with the 
programming.  This copy protection allows programmers to limit the programming that 
the end consumer can copy digitally.  Copy protection directives are signaled through 
Copy Control Information embedded in the digital content and may be “Copy Never,” 
“Copy One Generation (i.e., no copy of a copy can be made),” “Copy No More” or 
“Copy Freely.”  The FCC’s rules permit programmers to mark various categories of 

In order to start cable service for this device, please 
contact your cable provider: 

 
CableCARD

TM

 ID: XXX-XXX-XXX-XXX-X 

Host ID: XXX-XXX-XXX-XXX-X 
 
Press Menu to return to the Set Up Screen