Differences between revisions 13 and 14
Revision 13 as of 2008-10-22 12:21:22
Size: 2565
Comment:
Revision 14 as of 2008-10-29 09:48:48
Size: 2578
Comment:
Deletions are marked like this. Additions are marked like this.
Line 40: Line 40:
You cannot directly filter PROTO protocols while capturing. However, if you know the [[TCP]] port used (see above), you can filter on that one. You can directly filter SIMULCRYPT protocols while capturing if you know the [[TCP]] port used (see above) and it is configured in the protocol preferences.

Simulcrypt (SimulCrypt)

A DVB protocol published by ETSI used in IPTV / broadcast TV head-ends to enable use of multiple key management systems. The standardised SCS (Simulcrypt Synchroniser) to ECMG (Entitlement Control Message Generator) interface is used to allow multiple key management systems to operate in parallel, each generating its own (typically proprietary) ECMs (Entitlement Control Messages).

History

XXX - add a brief description of PROTO history

Protocol dependencies

  • TCP: For the SCS to ECMG, SIMULCRYPT uses TCP as its transport protocol. There is no well known TCP port for SIMULCRYPT traffic as multiple TCP connections are possible (typically each TCP connection is associated to a given key management system for a particular TV channel).

Example traffic

XXX - Add example decoded traffic for this protocol here (as plain text or Wireshark screenshot).

Wireshark

The SIMULCRYPT dissector is fully functional for the SCS - ECMG interface. It decodes the Simulcrypt syntax to analyse different Simulcrypt messages and associated TLV parameters.

Preference Settings

(XXX add links to preference settings affecting how PROTO is dissected).

Example capture file

Display Filter

A complete list of PROTO display filter fields can be found in the display filter reference

  • Show only the PROTO based traffic:

     simulcrypt 

Capture Filter

You can directly filter SIMULCRYPT protocols while capturing if you know the TCP port used (see above) and it is configured in the protocol preferences.

  • Capture only the PROTO traffic over the chosen port (<port>):

     tcp port <port> 

Discussion

SIMULCRYPT (last edited 2010-10-05 19:07:27 by GuyHarris)