ITU-T H.233 (11 2002) (英) Confidentiality system for audiovisual services

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1、INTERNATIONALTELECOMMUNICATIONUNIONITU-TH.233TELECOMMUNICATION(11/2002)STANDARDIZATIONSECTOROFITUSERIESH:AUDIOVISUALANDMULTIMEDIASYSTEMSInfrastructureofaudiovisualservices–SystemsaspectsConfidentialitysystemforaudiovisualservicesITU-TRecommendationH.233ITU-TH-SERIESRECOMMENDATIONSAUDIOVISUALAND

2、MULTIMEDIASYSTEMSCHARACTERISTICSOFVISUALTELEPHONESYSTEMSH.100–H.199INFRASTRUCTUREOFAUDIOVISUALSERVICESGeneralH.200–H.219TransmissionmultiplexingandsynchronizationH.220–H.229SystemsaspectsH.230–H.239CommunicationproceduresH.240–H.259CodingofmovingvideoH.260–H.279RelatedsystemsaspectsH.280–H.299S

3、YSTEMSANDTERMINALEQUIPMENTFORAUDIOVISUALSERVICESH.300–H.399SUPPLEMENTARYSERVICESFORMULTIMEDIAH.450–H.499MOBILITYANDCOLLABORATIONPROCEDURESOverviewofMobilityandCollaboration,definitions,protocolsandproceduresH.500–H.509MobilityforH-SeriesmultimediasystemsandservicesH.510–H.519Mobilemultimediacol

4、laborationapplicationsandservicesH.520–H.529SecurityformobilemultimediasystemsandservicesH.530–H.539SecurityformobilemultimediacollaborationapplicationsandservicesH.540–H.549MobilityinterworkingproceduresH.550–H.559Mobilemultimediacollaborationinter-workingproceduresH.560–H.569Forfurtherdetails

5、,pleaserefertothelistofITU-TRecommendations.ITU-TRecommendationH.233ConfidentialitysystemforaudiovisualservicesSummaryThisRecommendationdescribestheconfidentialitypartofaprivacysystemsuitableforuseinnarrow-bandaudiovisualservicesconformingtoITU-TRecsH.320,H.221,H.230andH.242.Althoughanencryptio

6、nalgorithmisrequiredforsuchaprivacysystem,thespecificationsofsuchalgorithmsarenotallincludedhere:thesystemcatersformorethanonespecificalgorithm.SomeofthosealgorithmsandtheirparametersaredefinedinAnnexA.Aprivacysystemconsistsoftwoparts,theconfidentialitymechanismorencryptionprocessforthedata,and

7、akeymanagementsubsystemasdescribedinITU-TRec.H.234.ThisrevisedversionofITU-TRec.H.233introducesanumberofcorrectionsandclarificationstotheoriginalversionand,moreimportantly,introducesthedescriptionontheusageofTripleDESandAESencrypt